diff --git a/models/chunter/src/index.ts b/models/chunter/src/index.ts
index c32793be8b..7d7b8003a4 100644
--- a/models/chunter/src/index.ts
+++ b/models/chunter/src/index.ts
@@ -184,10 +184,6 @@ export function createModel (builder: Builder, options = { addApplication: true
       }
     })
 
-    builder.mixin(spaceClass, core.class.Class, notification.mixin.SpaceLastEdit, {
-      lastEditField: 'lastMessage'
-    })
-
     builder.mixin(spaceClass, core.class.Class, view.mixin.ObjectEditor, {
       editor: chunter.component.EditChannel
     })
@@ -197,12 +193,10 @@ export function createModel (builder: Builder, options = { addApplication: true
     getName: chunter.function.GetDmName
   })
 
-  builder.mixin(chunter.class.Message, core.class.Class, notification.mixin.TrackedDoc, {})
   builder.mixin(chunter.class.Message, core.class.Class, notification.mixin.ClassCollaborators, {
     fields: ['createdBy', 'replies']
   })
 
-  builder.mixin(chunter.class.ChunterSpace, core.class.Class, notification.mixin.TrackedDoc, {})
   builder.mixin(chunter.class.DirectMessage, core.class.Class, notification.mixin.ClassCollaborators, {
     fields: ['members']
   })
diff --git a/models/contact/src/index.ts b/models/contact/src/index.ts
index 1c8e9a5749..fd172571be 100644
--- a/models/contact/src/index.ts
+++ b/models/contact/src/index.ts
@@ -324,10 +324,6 @@ export function createModel (builder: Builder): void {
     inlineEditor: contact.component.ContactArrayEditor
   })
 
-  builder.mixin(contact.class.Contact, core.class.Class, notification.mixin.TrackedDoc, {})
-
-  builder.mixin(contact.class.Channel, core.class.Class, notification.mixin.TrackedDoc, {})
-
   builder.mixin(contact.class.Contact, core.class.Class, notification.mixin.ClassCollaborators, {
     fields: []
   })
diff --git a/models/document/src/index.ts b/models/document/src/index.ts
index 045fb2a312..492b65bf7f 100644
--- a/models/document/src/index.ts
+++ b/models/document/src/index.ts
@@ -45,7 +45,6 @@ import core, { TAttachedDoc, TDoc } from '@hcengineering/model-core'
 import presentation from '@hcengineering/model-presentation'
 import view, { actionTemplates, createAction } from '@hcengineering/model-view'
 import workbench from '@hcengineering/model-workbench'
-import notification from '@hcengineering/notification'
 import tags from '@hcengineering/tags'
 import document from './plugin'
 
@@ -187,8 +186,6 @@ export function createModel (builder: Builder): void {
     component: document.component.CreateDocument
   })
 
-  builder.mixin(document.class.Document, core.class.Class, notification.mixin.TrackedDoc, {})
-
   builder.mixin(document.class.Document, core.class.Class, view.mixin.ObjectPanel, {
     component: document.component.EditDoc
   })
diff --git a/models/inventory/src/index.ts b/models/inventory/src/index.ts
index e5ee904fb8..9cae385fa3 100644
--- a/models/inventory/src/index.ts
+++ b/models/inventory/src/index.ts
@@ -20,7 +20,6 @@ import attachment from '@hcengineering/model-attachment'
 import core, { TAttachedDoc } from '@hcengineering/model-core'
 import { createAction } from '@hcengineering/model-view'
 import workbench from '@hcengineering/model-workbench'
-import notification from '@hcengineering/notification'
 import setting from '@hcengineering/setting'
 import view, { Viewlet } from '@hcengineering/view'
 import inventory from './plugin'
@@ -160,8 +159,6 @@ export function createModel (builder: Builder): void {
     inventory.category.Inventory
   )
 
-  builder.mixin(inventory.class.Product, core.class.Class, notification.mixin.TrackedDoc, {})
-
   createAction(builder, {
     label: inventory.string.CreateSubcategory,
     icon: inventory.icon.Categories,
diff --git a/models/notification/src/index.ts b/models/notification/src/index.ts
index 7dffc599d0..40784297b6 100644
--- a/models/notification/src/index.ts
+++ b/models/notification/src/index.ts
@@ -37,7 +37,6 @@ import view, { createAction } from '@hcengineering/model-view'
 import {
   DocUpdates,
   EmailNotification,
-  LastView,
   Notification,
   NotificationGroup,
   notificationId,
@@ -46,8 +45,7 @@ import {
   NotificationSetting,
   NotificationStatus,
   NotificationTemplate,
-  NotificationType,
-  SpaceLastEdit
+  NotificationType
 } from '@hcengineering/notification'
 import type { Asset, IntlString } from '@hcengineering/platform'
 import setting from '@hcengineering/setting'
@@ -61,13 +59,6 @@ export { notification as default }
 
 export const DOMAIN_NOTIFICATION = 'notification' as Domain
 
-@Model(notification.class.LastView, core.class.Doc, DOMAIN_NOTIFICATION)
-export class TLastView extends TDoc implements LastView {
-  @Prop(TypeRef(core.class.Account), core.string.ModifiedBy)
-  @Index(IndexKind.Indexed)
-    user!: Ref<Account>
-}
-
 @Model(notification.class.Notification, core.class.AttachedDoc, DOMAIN_NOTIFICATION)
 export class TNotification extends TAttachedDoc implements Notification {
   @Prop(TypeRef(core.class.Tx), 'TX' as IntlString)
@@ -137,19 +128,11 @@ export class TNotificationSetting extends TPreference implements NotificationSet
   enabled!: boolean
 }
 
-@Mixin(notification.mixin.SpaceLastEdit, core.class.Class)
-export class TSpaceLastEdit extends TClass implements SpaceLastEdit {
-  lastEditField!: string
-}
-
 @Mixin(notification.mixin.ClassCollaborators, core.class.Class)
 export class TClassCollaborators extends TClass {
   fields!: string[]
 }
 
-@Mixin(notification.mixin.TrackedDoc, core.class.Class)
-export class TTrackedDoc extends TClass {}
-
 @Mixin(notification.mixin.Collaborators, core.class.Doc)
 @UX(notification.string.Collaborators)
 export class TCollaborators extends TDoc {
@@ -175,23 +158,20 @@ export class TDocUpdates extends TDoc implements DocUpdates {
     hidden!: boolean
 
   attachedToClass!: Ref<Class<Doc>>
-  lastTx!: Ref<TxCUD<Doc>>
-  lastTxTime!: Timestamp
+  lastTx?: Ref<TxCUD<Doc>>
+  lastTxTime?: Timestamp
   txes!: [Ref<TxCUD<Doc>>, Timestamp][]
 }
 
 export function createModel (builder: Builder): void {
   builder.createModel(
-    TLastView,
     TNotification,
     TEmaiNotification,
     TNotificationType,
     TNotificationProvider,
     TNotificationSetting,
     TNotificationGroup,
-    TSpaceLastEdit,
     TClassCollaborators,
-    TTrackedDoc,
     TCollaborators,
     TDocUpdates,
     TNotificationObjectPresenter
diff --git a/models/notification/src/migration.ts b/models/notification/src/migration.ts
index c46e91a842..9c3d510935 100644
--- a/models/notification/src/migration.ts
+++ b/models/notification/src/migration.ts
@@ -13,22 +13,9 @@
 // limitations under the License.
 //
 
-import core, {
-  Account,
-  AttachedDoc,
-  Class,
-  Collection,
-  Data,
-  Doc,
-  DOMAIN_TX,
-  generateId,
-  Ref,
-  TxCollectionCUD,
-  TxOperations,
-  TxRemoveDoc
-} from '@hcengineering/core'
+import core, { AttachedDoc, Class, Collection, Data, Doc, DOMAIN_TX, Ref, TxOperations } from '@hcengineering/core'
 import { MigrateOperation, MigrationClient, MigrationUpgradeClient } from '@hcengineering/model'
-import notification, { LastView, NotificationType } from '@hcengineering/notification'
+import notification, { DocUpdates, NotificationType } from '@hcengineering/notification'
 import { DOMAIN_NOTIFICATION } from '.'
 
 async function fillNotificationText (client: MigrationClient): Promise<void> {
@@ -80,79 +67,6 @@ async function createSpace (client: MigrationUpgradeClient): Promise<void> {
   }
 }
 
-async function migrateLastView (client: MigrationClient): Promise<void> {
-  // lets clear last view txes (it should be derived and shouldn't store in tx collection)
-  const txes = await client.find(DOMAIN_TX, {
-    objectClass: notification.class.LastView
-  })
-  for (const tx of txes) {
-    await client.delete(DOMAIN_TX, tx._id)
-  }
-
-  const h = client.hierarchy
-  const docClasses = h.getDescendants(core.class.Doc)
-  const trackedClasses = docClasses.filter((p) => h.hasMixin(h.getClass(p), notification.mixin.TrackedDoc))
-  const allowedClasses = new Set<Ref<Class<Doc>>>()
-  trackedClasses.forEach((p) => h.getDescendants(p).forEach((a) => allowedClasses.add(a)))
-
-  const removeTxes = await client.find<TxRemoveDoc<Doc>>(
-    DOMAIN_TX,
-    {
-      _class: core.class.TxRemoveDoc
-    },
-    { projection: { objectId: 1 } }
-  )
-
-  const removedDocs: Set<Ref<Doc>> = new Set(removeTxes.map((p) => p.objectId))
-  const removedCollectionTxes = await client.find<TxCollectionCUD<Doc, AttachedDoc>>(
-    DOMAIN_TX,
-    {
-      _class: core.class.TxCollectionCUD,
-      'tx._class': core.class.TxRemoveDoc
-    },
-    { projection: { tx: 1 } }
-  )
-  removedCollectionTxes.forEach((p) => p.tx.objectId)
-
-  const newLastView: Map<Ref<Account>, LastView> = new Map()
-  let total = 0
-  while (true) {
-    const lastViews = await client.find<LastView>(
-      DOMAIN_NOTIFICATION,
-      {
-        _class: notification.class.LastView,
-        attachedTo: { $exists: true }
-      },
-      { limit: 10000 }
-    )
-    total += lastViews.length
-    console.log(`migrate ${total} notifications`)
-    if (lastViews.length === 0) break
-    for (const lastView of lastViews) {
-      if (
-        lastView.user !== core.account.System &&
-        allowedClasses.has(lastView.attachedToClass) &&
-        !removedDocs.has(lastView.attachedTo)
-      ) {
-        const obj: LastView = newLastView.get(lastView.user) ?? {
-          user: lastView.user,
-          modifiedBy: lastView.user,
-          modifiedOn: Date.now(),
-          _id: generateId(),
-          space: notification.space.Notifications,
-          _class: notification.class.LastView
-        }
-        obj[lastView.attachedTo] = lastView.lastView
-        newLastView.set(lastView.user, obj)
-      }
-    }
-    await Promise.all(lastViews.map((p) => client.delete(DOMAIN_NOTIFICATION, p._id)))
-  }
-  for (const [, lastView] of newLastView) {
-    await client.create(DOMAIN_NOTIFICATION, lastView)
-  }
-}
-
 async function fillCollaborators (client: MigrationClient): Promise<void> {
   const targetClasses = await client.model.findAll(notification.mixin.ClassCollaborators, {})
   for (const targetClass of targetClasses) {
@@ -227,6 +141,28 @@ async function createCustomFieldTypes (client: MigrationUpgradeClient): Promise<
   }
 }
 
+async function changeDocUpdatesSpaces (client: MigrationUpgradeClient): Promise<void> {
+  const txop = new TxOperations(client, core.account.System)
+  const docUpdates = await client.findAll(notification.class.DocUpdates, { space: notification.space.Notifications })
+  const map = new Map<Ref<Class<Doc>>, Map<Ref<Doc>, DocUpdates[]>>()
+  for (const docUpdate of docUpdates) {
+    const _class = map.get(docUpdate.attachedToClass) ?? new Map()
+    const arr = _class.get(docUpdate.attachedTo) ?? []
+    arr.push(docUpdate)
+    _class.set(docUpdate.attachedTo, arr)
+    map.set(docUpdate.attachedToClass, _class)
+  }
+  for (const [_class, arr] of map) {
+    const ids = Array.from(arr.keys())
+    const docs = await client.findAll(_class, { _id: { $in: ids } })
+    for (const doc of docs) {
+      const updateDocs = arr.get(doc._id)
+      if (updateDocs === undefined) continue
+      await Promise.all(updateDocs.map(async (p) => await txop.update(p, { space: doc.space })))
+    }
+  }
+}
+
 async function cleanOutdatedSettings (client: MigrationClient): Promise<void> {
   const res = await client.find(DOMAIN_NOTIFICATION, {
     _class: notification.class.NotificationSetting
@@ -240,7 +176,6 @@ export const notificationOperation: MigrateOperation = {
   async migrate (client: MigrationClient): Promise<void> {
     await removeSettings(client)
     await fillNotificationText(client)
-    await migrateLastView(client)
     await fillCollaborators(client)
     await fillDocUpdatesHidder(client)
     await cleanOutdatedSettings(client)
@@ -248,5 +183,6 @@ export const notificationOperation: MigrateOperation = {
   async upgrade (client: MigrationUpgradeClient): Promise<void> {
     await createSpace(client)
     await createCustomFieldTypes(client)
+    await changeDocUpdatesSpaces(client)
   }
 }
diff --git a/models/notification/src/plugin.ts b/models/notification/src/plugin.ts
index 8e0916b704..9c945a78e1 100644
--- a/models/notification/src/plugin.ts
+++ b/models/notification/src/plugin.ts
@@ -23,7 +23,6 @@ import { Application } from '@hcengineering/workbench'
 
 export default mergeIds(notificationId, notification, {
   string: {
-    LastView: '' as IntlString,
     PlatformNotification: '' as IntlString,
     BrowserNotification: '' as IntlString,
     EmailNotification: '' as IntlString,
diff --git a/models/recruit/src/index.ts b/models/recruit/src/index.ts
index eda08c050c..2afd3710d5 100644
--- a/models/recruit/src/index.ts
+++ b/models/recruit/src/index.ts
@@ -679,10 +679,6 @@ export function createModel (builder: Builder): void {
     recruit.viewlet.ApplicantDashboard
   )
 
-  builder.mixin(recruit.class.Applicant, core.class.Class, notification.mixin.TrackedDoc, {})
-
-  builder.mixin(recruit.class.Vacancy, core.class.Class, notification.mixin.TrackedDoc, {})
-
   builder.mixin(recruit.class.Applicant, core.class.Class, task.mixin.KanbanCard, {
     card: recruit.component.KanbanCard
   })
diff --git a/models/server-notification/src/index.ts b/models/server-notification/src/index.ts
index 98966531bc..928402609b 100644
--- a/models/server-notification/src/index.ts
+++ b/models/server-notification/src/index.ts
@@ -55,22 +55,10 @@ export function createModel (builder: Builder): void {
     trigger: serverNotification.trigger.OnBacklinkCreate
   })
 
-  builder.createDoc(serverCore.class.Trigger, core.space.Model, {
-    trigger: serverNotification.trigger.UpdateLastView
-  })
-
   builder.createDoc(serverCore.class.Trigger, core.space.Model, {
     trigger: serverNotification.trigger.CollaboratorDocHandler
   })
 
-  builder.createDoc(serverCore.class.Trigger, core.space.Model, {
-    trigger: serverNotification.trigger.OnUpdateLastView
-  })
-
-  builder.createDoc(serverCore.class.Trigger, core.space.Model, {
-    trigger: serverNotification.trigger.OnAddCollborator
-  })
-
   builder.createDoc(serverCore.class.Trigger, core.space.Model, {
     trigger: serverNotification.trigger.OnAttributeCreate
   })
diff --git a/models/task/src/index.ts b/models/task/src/index.ts
index afdef8b63f..fbae6560bc 100644
--- a/models/task/src/index.ts
+++ b/models/task/src/index.ts
@@ -34,7 +34,7 @@ import {
 } from '@hcengineering/model'
 import core, { TAttachedDoc, TClass, TDoc, TSpace, TStatus } from '@hcengineering/model-core'
 import view, { createAction, template, actionTemplates as viewTemplates } from '@hcengineering/model-view'
-import notification from '@hcengineering/notification'
+import {} from '@hcengineering/notification'
 import { IntlString } from '@hcengineering/platform'
 import tags from '@hcengineering/tags'
 import {
@@ -321,8 +321,6 @@ export function createModel (builder: Builder): void {
     editor: task.component.TaskHeader
   })
 
-  builder.mixin(task.class.Task, core.class.Class, notification.mixin.TrackedDoc, {})
-
   builder.createDoc(
     view.class.ActionCategory,
     core.space.Model,
diff --git a/models/tracker/src/index.ts b/models/tracker/src/index.ts
index 544e54b7ed..24b31ba582 100644
--- a/models/tracker/src/index.ts
+++ b/models/tracker/src/index.ts
@@ -954,8 +954,6 @@ export function createModel (builder: Builder): void {
     inlineEditor: tracker.component.ComponentStatusEditor
   })
 
-  builder.mixin(tracker.class.Issue, core.class.Class, notification.mixin.TrackedDoc, {})
-
   builder.mixin(tracker.class.TypeIssuePriority, core.class.Class, view.mixin.AllValuesFunc, {
     func: tracker.function.GetAllPriority
   })
diff --git a/plugins/board-resources/src/components/presenters/NotificationPresenter.svelte b/plugins/board-resources/src/components/presenters/NotificationPresenter.svelte
index 01866bc38b..66728199a3 100644
--- a/plugins/board-resources/src/components/presenters/NotificationPresenter.svelte
+++ b/plugins/board-resources/src/components/presenters/NotificationPresenter.svelte
@@ -22,9 +22,8 @@
   export let size: IconSize = 'small'
 
   const notificationClient = NotificationClientImpl.getClient()
-  const lastViews = notificationClient.getLastViews()
-  $: lastView = $lastViews[object._id]
-  $: subscribed = lastView !== undefined && lastView !== -1
+  const store = notificationClient.docUpdatesStore
+  $: subscribed = $store.get(object._id) !== undefined
 </script>
 
 {#if subscribed}
diff --git a/plugins/chunter-resources/src/components/Channel.svelte b/plugins/chunter-resources/src/components/Channel.svelte
index 63b125e1a3..7dcf6b42a1 100644
--- a/plugins/chunter-resources/src/components/Channel.svelte
+++ b/plugins/chunter-resources/src/components/Channel.svelte
@@ -15,8 +15,8 @@
 <script lang="ts">
   import attachment, { Attachment } from '@hcengineering/attachment'
   import type { ChunterMessage, Message } from '@hcengineering/chunter'
-  import core, { Ref, Space, Timestamp, WithLookup } from '@hcengineering/core'
-  import { LastView } from '@hcengineering/notification'
+  import core, { Doc, Ref, Space, Timestamp, WithLookup } from '@hcengineering/core'
+  import { DocUpdates } from '@hcengineering/notification'
   import { NotificationClientImpl } from '@hcengineering/notification-resources'
   import { createQuery } from '@hcengineering/presentation'
   import { location as locationStore } from '@hcengineering/ui'
@@ -69,11 +69,11 @@
     }
   })
 
-  let messages: WithLookup<Message>[] | undefined
+  let messages: WithLookup<Message>[] = []
   const query = createQuery()
 
   const notificationClient = NotificationClientImpl.getClient()
-  const lastViews = notificationClient.getLastViews()
+  const docUpdates = notificationClient.docUpdatesStore
 
   $: updateQuery(space)
 
@@ -90,8 +90,8 @@
       },
       (res) => {
         messages = res
-        newMessagesPos = newMessagesStart(messages)
-        notificationClient.updateLastView(space, chunter.class.ChunterSpace)
+        newMessagesPos = newMessagesStart(messages, $docUpdates)
+        notificationClient.read(space)
       },
       {
         lookup: {
@@ -102,22 +102,22 @@
     )
   }
 
-  function newMessagesStart (messages: Message[]): number {
+  function newMessagesStart (messages: Message[], docUpdates: Map<Ref<Doc>, DocUpdates>): number {
     if (space === undefined) return -1
-    const lastView = ($lastViews as any)[space]
-    if (lastView === undefined || lastView === -1) return -1
+    const docUpdate = docUpdates.get(space)
+    const lastView = docUpdate?.txes?.[0]?.[1]
+    if (docUpdate === undefined || lastView === undefined) return -1
     for (let index = 0; index < messages.length; index++) {
       const message = messages[index]
-      if (message.createOn > lastView) return index
+      if (message.createOn >= lastView) return index
     }
     return -1
   }
 
-  $: markUnread($lastViews)
-  function markUnread (lastViews: LastView) {
-    if (messages === undefined) return
-    const newPos = newMessagesStart(messages)
-    if (newPos !== -1 || newMessagesPos === -1) {
+  $: markUnread(messages, $docUpdates)
+  function markUnread (messages: Message[], docUpdates: Map<Ref<Doc>, DocUpdates>) {
+    const newPos = newMessagesStart(messages, docUpdates)
+    if (newPos !== -1) {
       newMessagesPos = newPos
     }
   }
@@ -165,7 +165,7 @@
   }
 
   let showFixed: boolean | undefined
-  let selectedDate: Timestamp | undefined = messages ? getDay(messages[0].createOn) : undefined
+  let selectedDate: Timestamp | undefined = undefined
   function handleScroll () {
     const upperVisible = getFirstVisible()
     if (upperVisible) {
diff --git a/plugins/chunter-resources/src/components/Thread.svelte b/plugins/chunter-resources/src/components/Thread.svelte
index 9a6d2709fa..91da929878 100644
--- a/plugins/chunter-resources/src/components/Thread.svelte
+++ b/plugins/chunter-resources/src/components/Thread.svelte
@@ -18,15 +18,7 @@
   import type { ChunterSpace, Message, ThreadMessage } from '@hcengineering/chunter'
   import contact, { Employee, EmployeeAccount, getName } from '@hcengineering/contact'
   import { employeeByIdStore } from '@hcengineering/contact-resources'
-  import core, {
-    FindOptions,
-    generateId,
-    getCurrentAccount,
-    IdMap,
-    Ref,
-    SortingOrder,
-    TxFactory
-  } from '@hcengineering/core'
+  import core, { FindOptions, IdMap, Ref, SortingOrder, generateId, getCurrentAccount } from '@hcengineering/core'
   import { NotificationClientImpl } from '@hcengineering/notification-resources'
   import { createQuery, getClient } from '@hcengineering/presentation'
   import { Label } from '@hcengineering/ui'
@@ -97,7 +89,7 @@
         } else {
           comments = res.reverse()
         }
-        notificationClient.updateLastView(id, chunter.class.Message)
+        notificationClient.read(id)
       },
       options
     )
@@ -130,8 +122,7 @@
     if (parent === undefined) return
     const { message, attachments } = event.detail
     const me = getCurrentAccount()._id
-    const txFactory = new TxFactory(me)
-    const tx = txFactory.createTxCreateDoc<ThreadMessage>(
+    await client.createDoc(
       chunter.class.ThreadMessage,
       parent.space,
       {
@@ -145,9 +136,6 @@
       },
       commentId
     )
-    tx.attributes.createOn = tx.modifiedOn
-    await notificationClient.updateLastView(_id, chunter.class.Message, tx.modifiedOn, true)
-    await client.tx(tx)
 
     // Create an backlink to document
     await createBacklinks(client, parent._id, parent._class, commentId, message)
diff --git a/plugins/chunter-resources/src/components/ThreadView.svelte b/plugins/chunter-resources/src/components/ThreadView.svelte
index 9087d76d40..6489de57bc 100644
--- a/plugins/chunter-resources/src/components/ThreadView.svelte
+++ b/plugins/chunter-resources/src/components/ThreadView.svelte
@@ -16,8 +16,8 @@
   import attachment, { Attachment } from '@hcengineering/attachment'
   import { AttachmentRefInput } from '@hcengineering/attachment-resources'
   import type { ChunterMessage, Message, ThreadMessage } from '@hcengineering/chunter'
-  import core, { Ref, Space, generateId, getCurrentAccount } from '@hcengineering/core'
-  import { LastView } from '@hcengineering/notification'
+  import core, { Doc, Ref, Space, generateId, getCurrentAccount } from '@hcengineering/core'
+  import { DocUpdates } from '@hcengineering/notification'
   import { NotificationClientImpl } from '@hcengineering/notification-resources'
   import { createQuery, getClient } from '@hcengineering/presentation'
   import { IconClose, Label, getCurrentResolvedLocation, navigate } from '@hcengineering/ui'
@@ -59,7 +59,7 @@
   })
 
   const notificationClient = NotificationClientImpl.getClient()
-  const lastViews = notificationClient.getLastViews()
+  const docUpdates = notificationClient.docUpdatesStore
 
   const lookup = {
     _id: { attachments: attachment.class.Attachment, reactions: chunter.class.Reaction },
@@ -101,8 +101,8 @@
       },
       (res) => {
         comments = res
-        newMessagesPos = newMessagesStart(comments, $lastViews)
-        notificationClient.updateLastView(id, chunter.class.Message)
+        newMessagesPos = newMessagesStart(comments, $docUpdates)
+        notificationClient.read(id)
       },
       {
         lookup
@@ -159,23 +159,25 @@
   }
   let comments: ThreadMessage[] = []
 
-  function newMessagesStart (comments: ThreadMessage[], lastViews: LastView): number {
-    const lastView = (lastViews as any)[_id]
-    if (lastView === undefined || lastView === -1) return -1
+  function newMessagesStart (comments: ThreadMessage[], docUpdates: Map<Ref<Doc>, DocUpdates>): number {
+    const docUpdate = docUpdates.get(_id)
+    const lastView = docUpdate?.txes?.[0]?.[1]
+    if (docUpdate === undefined || lastView === undefined) return -1
     for (let index = 0; index < comments.length; index++) {
       const comment = comments[index]
-      if (comment.createOn > lastView) return index
+      if (comment.createOn >= lastView) return index
     }
     return -1
   }
 
-  $: markUnread($lastViews)
-  function markUnread (lastViews: LastView) {
-    const newPos = newMessagesStart(comments, lastViews)
-    if (newPos !== -1 || newMessagesPos === -1) {
+  $: markUnread(comments, $docUpdates)
+  function markUnread (comments: ThreadMessage[], docUpdates: Map<Ref<Doc>, DocUpdates>) {
+    const newPos = newMessagesStart(comments, docUpdates)
+    if (newPos !== -1) {
       newMessagesPos = newPos
     }
   }
+
   let newMessagesPos: number = -1
   let loading = false
 </script>
diff --git a/plugins/chunter-resources/src/index.ts b/plugins/chunter-resources/src/index.ts
index 40e37b15bf..5d27dd7d58 100644
--- a/plugins/chunter-resources/src/index.ts
+++ b/plugins/chunter-resources/src/index.ts
@@ -67,12 +67,12 @@ export { CommentPopup, CommentsPresenter }
 
 async function MarkUnread (object: Message): Promise<void> {
   const client = NotificationClientImpl.getClient()
-  await client.updateLastView(object.space, chunter.class.ChunterSpace, object.createOn - 1, true)
+  await client.forceRead(object.space, chunter.class.ChunterSpace)
 }
 
 async function MarkCommentUnread (object: ThreadMessage): Promise<void> {
   const client = NotificationClientImpl.getClient()
-  await client.updateLastView(object.attachedTo, object.attachedToClass, object.createOn - 1, true)
+  await client.forceRead(object.attachedTo, object.attachedToClass)
 }
 
 async function SubscribeMessage (object: Message): Promise<void> {
@@ -117,14 +117,20 @@ async function UnsubscribeMessage (object: ChunterMessage): Promise<void> {
         }
       }
     )
-    await notificationClient.unsubscribe(object.attachedTo)
+    const docUpdate = notificationClient.docUpdatesMap.get(object.attachedTo)
+    if (docUpdate !== undefined) {
+      await client.remove(docUpdate)
+    }
   } else {
     await client.updateMixin(object._id, object._class, object.space, notification.mixin.Collaborators, {
       $pull: {
         collaborators: acc._id
       }
     })
-    await notificationClient.unsubscribe(object._id)
+    const docUpdate = notificationClient.docUpdatesMap.get(object._id)
+    if (docUpdate !== undefined) {
+      await client.remove(docUpdate)
+    }
   }
 }
 
diff --git a/plugins/contact-resources/src/components/ChannelsDropdown.svelte b/plugins/contact-resources/src/components/ChannelsDropdown.svelte
index f00208800d..03f80ab870 100644
--- a/plugins/contact-resources/src/components/ChannelsDropdown.svelte
+++ b/plugins/contact-resources/src/components/ChannelsDropdown.svelte
@@ -17,7 +17,7 @@
   import type { Channel, ChannelProvider } from '@hcengineering/contact'
   import contact from '@hcengineering/contact'
   import type { AttachedData, Doc, Ref } from '@hcengineering/core'
-  import notification, { LastView } from '@hcengineering/notification'
+  import notification, { DocUpdates } from '@hcengineering/notification'
   import { Asset, IntlString, getResource } from '@hcengineering/platform'
   import presentation from '@hcengineering/presentation'
   import {
@@ -50,8 +50,8 @@
   export let focusIndex = -1
   export let restricted: Ref<ChannelProvider>[] = []
 
-  let lastViews: Writable<LastView | undefined> = writable()
-  getResource(notification.function.GetNotificationClient).then((res) => (lastViews = res().getLastViews()))
+  let docUpdates: Writable<Map<Ref<Doc>, DocUpdates>> = writable(new Map())
+  getResource(notification.function.GetNotificationClient).then((res) => (docUpdates = res().docUpdatesStore))
   const dispatch = createEventDispatcher()
 
   interface Item {
@@ -70,11 +70,11 @@
   function getProvider (
     item: AttachedData<Channel>,
     map: Map<Ref<ChannelProvider>, ChannelProvider>,
-    lastViews: LastView | undefined
+    docUpdates: Map<Ref<Doc>, DocUpdates>
   ): Item | undefined {
     const provider = map.get(item.provider)
     if (provider) {
-      const notification = (item as Channel)._id !== undefined ? isNew(item as Channel, lastViews) : false
+      const notification = (item as Channel)._id !== undefined ? isNew(item as Channel, docUpdates) : false
       return {
         label: provider.label,
         icon: provider.icon as Asset,
@@ -92,16 +92,14 @@
     }
   }
 
-  function isNew (item: Channel, lastViews: LastView | undefined): boolean {
-    if (item.lastMessage === undefined) return false
-    const lastView =
-      (item as Channel)._id !== undefined && lastViews !== undefined ? lastViews[(item as Channel)._id] : undefined
-    return lastView ? lastView < item.lastMessage : (item.items ?? 0) > 0
+  function isNew (item: Channel, docUpdates: Map<Ref<Doc>, DocUpdates>): boolean {
+    const docUpdate = docUpdates.get(item._id)
+    return docUpdate ? docUpdate.txes.length > 0 : (item.items ?? 0) > 0
   }
 
   async function update (
     value: AttachedData<Channel>[] | Channel | null,
-    lastViews: LastView | undefined,
+    docUpdates: Map<Ref<Doc>, DocUpdates>,
     channelProviders: ChannelProvider[]
   ) {
     if (value == null) {
@@ -112,13 +110,13 @@
     const map = getChannelProviders(channelProviders)
     if (Array.isArray(value)) {
       for (const item of value) {
-        const provider = getProvider(item, map, lastViews)
+        const provider = getProvider(item, map, docUpdates)
         if (provider !== undefined) {
           result.push(provider)
         }
       }
     } else {
-      const provider = getProvider(value, map, lastViews)
+      const provider = getProvider(value, map, docUpdates)
       if (provider !== undefined) {
         result.push(provider)
       }
@@ -127,7 +125,7 @@
     updateMenu(displayItems, channelProviders)
   }
 
-  $: if (value) update(value, $lastViews, $channelProviders)
+  $: if (value) update(value, $docUpdates, $channelProviders)
 
   let displayItems: Item[] = []
   let actions: Action[] = []
@@ -148,7 +146,7 @@
           icon: pr.icon ?? contact.icon.SocialEdit,
           label: pr.label,
           action: async () => {
-            const provider = getProvider({ provider: pr._id, value: '' }, getChannelProviders(providers), $lastViews)
+            const provider = getProvider({ provider: pr._id, value: '' }, getChannelProviders(providers), $docUpdates)
             if (provider !== undefined) {
               if (_displayItems.filter((it) => it.provider === pr._id).length === 0) {
                 displayItems = [..._displayItems, provider]
diff --git a/plugins/contact-resources/src/components/ChannelsView.svelte b/plugins/contact-resources/src/components/ChannelsView.svelte
index 5205608bf5..0563769487 100644
--- a/plugins/contact-resources/src/components/ChannelsView.svelte
+++ b/plugins/contact-resources/src/components/ChannelsView.svelte
@@ -16,8 +16,8 @@
 <script lang="ts">
   import type { Channel, ChannelProvider } from '@hcengineering/contact'
   import type { AttachedData, Doc, Ref } from '@hcengineering/core'
-  import notification, { LastView } from '@hcengineering/notification'
-  import { Asset, getResource, IntlString } from '@hcengineering/platform'
+  import notification, { DocUpdates } from '@hcengineering/notification'
+  import { Asset, IntlString, getResource } from '@hcengineering/platform'
   import type { AnyComponent } from '@hcengineering/ui'
   import { Button } from '@hcengineering/ui'
   import { createEventDispatcher } from 'svelte'
@@ -31,8 +31,8 @@
   export let reverse: boolean = false
   export let integrations: Set<Ref<Doc>> = new Set<Ref<Doc>>()
 
-  let lastViews: Writable<LastView | undefined> = writable()
-  getResource(notification.function.GetNotificationClient).then((res) => (lastViews = res().getLastViews()))
+  let docUpdates: Writable<Map<Ref<Doc>, DocUpdates>> = writable(new Map())
+  getResource(notification.function.GetNotificationClient).then((res) => (docUpdates = res().docUpdatesStore))
 
   interface Item {
     label: IntlString
@@ -48,11 +48,11 @@
   function getProvider (
     item: AttachedData<Channel>,
     map: Map<Ref<ChannelProvider>, ChannelProvider>,
-    lastViews: LastView | undefined
+    docUpdates: Map<Ref<Doc>, DocUpdates>
   ): any | undefined {
     const provider = map.get(item.provider)
     if (provider) {
-      const notification = (item as Channel)._id !== undefined ? isNew(item as Channel, lastViews) : false
+      const notification = (item as Channel)._id !== undefined ? isNew(item as Channel, docUpdates) : false
       return {
         label: provider.label,
         icon: provider.icon as Asset,
@@ -66,16 +66,14 @@
     }
   }
 
-  function isNew (item: Channel, lastViews: LastView | undefined): boolean {
-    if (item.lastMessage === undefined) return false
-    const lastView =
-      (item as Channel)._id !== undefined && lastViews !== undefined ? lastViews[(item as Channel)._id] : undefined
-    return lastView ? lastView < item.lastMessage : (item.items ?? 0) > 0
+  function isNew (item: Channel, docUpdates: Map<Ref<Doc>, DocUpdates>): boolean {
+    const docUpdate = docUpdates.get(item._id)
+    return docUpdate ? docUpdate.txes.length > 0 : (item.items ?? 0) > 0
   }
 
   async function update (
     value: AttachedData<Channel>[] | Channel | null,
-    lastViews: LastView | undefined,
+    docUpdates: Map<Ref<Doc>, DocUpdates>,
     channels: ChannelProvider[]
   ) {
     if (value === null) {
@@ -86,13 +84,13 @@
     const map = getChannelProviders(channels)
     if (Array.isArray(value)) {
       for (const item of value) {
-        const provider = getProvider(item, map, lastViews)
+        const provider = getProvider(item, map, docUpdates)
         if (provider !== undefined) {
           result.push(provider)
         }
       }
     } else {
-      const provider = getProvider(value, map, lastViews)
+      const provider = getProvider(value, map, docUpdates)
       if (provider !== undefined) {
         result.push(provider)
       }
@@ -100,7 +98,7 @@
     displayItems = result
   }
 
-  $: if (value) update(value, $lastViews, $channelProviders)
+  $: if (value) update(value, $docUpdates, $channelProviders)
 
   let displayItems: Item[] = []
   let divHTML: HTMLElement
diff --git a/plugins/document-resources/src/components/EditDoc.svelte b/plugins/document-resources/src/components/EditDoc.svelte
index 95b02b8434..a00623b791 100644
--- a/plugins/document-resources/src/components/EditDoc.svelte
+++ b/plugins/document-resources/src/components/EditDoc.svelte
@@ -60,7 +60,6 @@
   export let embedded = false
 
   let lastId: Ref<Doc> = _id
-  let lastClass: Ref<Class<Doc>> = _class
 
   const query = createQuery()
 
@@ -79,17 +78,15 @@
   function read (_id: Ref<Doc>) {
     if (lastId !== _id) {
       const prev = lastId
-      const prevClass = lastClass
       lastId = _id
-      lastClass = _class
-      notificationClient.then((client) => client.updateLastView(prev, prevClass))
+      notificationClient.then((client) => client.read(prev))
     }
   }
 
   const currentUser = getCurrentAccount() as EmployeeAccount
 
   onDestroy(async () => {
-    notificationClient.then((client) => client.updateLastView(_id, _class))
+    notificationClient.then((client) => client.read(_id))
   })
 
   let requests: DocumentRequest[] = []
diff --git a/plugins/gmail-resources/src/components/Chats.svelte b/plugins/gmail-resources/src/components/Chats.svelte
index f2a5864cde..2c0c798f99 100644
--- a/plugins/gmail-resources/src/components/Chats.svelte
+++ b/plugins/gmail-resources/src/components/Chats.svelte
@@ -46,7 +46,7 @@
       { attachedTo: channelId },
       (res) => {
         messages = res
-        notificationClient.updateLastView(channelId, channel._class, undefined, true)
+        notificationClient.read(channelId)
       },
       { sort: { sendOn: SortingOrder.Descending } }
     )
@@ -68,7 +68,7 @@
         messages: convertMessages(object, channel, selectedMessages, $employeeAccountByIdStore, $employeeByIdStore)
       }
     )
-    await notificationClient.updateLastView(channel._id, channel._class, undefined, true)
+    await notificationClient.read(channel._id)
     clear()
   }
 
diff --git a/plugins/gmail-resources/src/components/Main.svelte b/plugins/gmail-resources/src/components/Main.svelte
index 9df7ef10e0..f45e0b9099 100644
--- a/plugins/gmail-resources/src/components/Main.svelte
+++ b/plugins/gmail-resources/src/components/Main.svelte
@@ -78,7 +78,7 @@
   async function selectHandler (e: CustomEvent): Promise<void> {
     currentMessage = e.detail
     if (channel !== undefined) {
-      await notificationClient.updateLastView(channel._id, channel._class, undefined, true)
+      await notificationClient.read(channel._id)
     }
   }
 
diff --git a/plugins/gmail-resources/src/components/NewMessage.svelte b/plugins/gmail-resources/src/components/NewMessage.svelte
index b466e3d6dc..2bd2c2f06e 100644
--- a/plugins/gmail-resources/src/components/NewMessage.svelte
+++ b/plugins/gmail-resources/src/components/NewMessage.svelte
@@ -73,7 +73,7 @@
       },
       objectId
     )
-    await notificationClient.updateLastView(channel._id, channel._class, undefined, true)
+    await notificationClient.read(channel._id)
     objectId = generateId()
     dispatch('close')
   }
diff --git a/plugins/gmail-resources/src/components/NewMessages.svelte b/plugins/gmail-resources/src/components/NewMessages.svelte
index 27984e606e..e8c62d1b8a 100644
--- a/plugins/gmail-resources/src/components/NewMessages.svelte
+++ b/plugins/gmail-resources/src/components/NewMessages.svelte
@@ -92,7 +92,7 @@
           .map((m) => m.trim())
           .filter((m) => m.length)
       })
-      await notificationClient.updateLastView(channel._id, channel._class, undefined, true)
+      await notificationClient.read(channel._id)
       for (const attachment of attachments) {
         await client.addCollection(
           attachmentP.class.Attachment,
diff --git a/plugins/notification-assets/lang/en.json b/plugins/notification-assets/lang/en.json
index daa76c562a..a8e3c2b5e8 100644
--- a/plugins/notification-assets/lang/en.json
+++ b/plugins/notification-assets/lang/en.json
@@ -1,6 +1,5 @@
 {
   "string": {
-    "LastView": "Last View",
     "Notification": "Notification",
     "Notifications": "Notifications",
     "NoNotifications": "No notifications",
diff --git a/plugins/notification-assets/lang/ru.json b/plugins/notification-assets/lang/ru.json
index fe4cf5c951..2eec1755ef 100644
--- a/plugins/notification-assets/lang/ru.json
+++ b/plugins/notification-assets/lang/ru.json
@@ -1,6 +1,5 @@
 {
   "string": {
-    "LastView": "Последний просмотр",
     "Notification": "Увдомление",
     "Notifications": "Уведомления",
     "NoNotifications": "Нет уведомлений",
diff --git a/plugins/notification-resources/src/components/BrowserNotificatator.svelte b/plugins/notification-resources/src/components/BrowserNotificatator.svelte
index 31564a1b1e..6af0ff8c61 100644
--- a/plugins/notification-resources/src/components/BrowserNotificatator.svelte
+++ b/plugins/notification-resources/src/components/BrowserNotificatator.svelte
@@ -13,8 +13,8 @@
 // limitations under the License.
 -->
 <script lang="ts">
-  import contact, { EmployeeAccount } from '@hcengineering/contact'
-  import { Doc, getCurrentAccount, Ref } from '@hcengineering/core'
+  import { EmployeeAccount } from '@hcengineering/contact'
+  import { getCurrentAccount, Ref } from '@hcengineering/core'
   import {
     NotificationProvider,
     NotificationSetting,
@@ -26,14 +26,10 @@
   import { getCurrentLocation, showPanel } from '@hcengineering/ui'
   import view from '@hcengineering/view'
   import notification from '../plugin'
-  import { NotificationClientImpl } from '../utils'
 
   const query = createQuery()
   const settingQuery = createQuery()
   const providersQuery = createQuery()
-  const notificationClient = NotificationClientImpl.getClient()
-  const lastViews = notificationClient.getLastViews()
-  const lastViewId: Ref<Doc> = ((getCurrentAccount() as EmployeeAccount).employee + 'notification') as Ref<Doc>
 
   let settingsReceived = false
   let settings: Map<Ref<NotificationType>, NotificationSetting> = new Map<Ref<NotificationType>, NotificationSetting>()
@@ -129,16 +125,6 @@
       alreadyShown.clear()
     }, 5000)
 
-    const lastView = ($lastViews as any)[lastViewId]
-    if ((lastView ?? notifyInstance.modifiedOn) > 0) {
-      await notificationClient.updateLastView(
-        lastViewId,
-        contact.class.Employee,
-        notifyInstance.modifiedOn,
-        lastView === undefined
-      )
-    }
-
     // eslint-disable-next-line
     const notification = new Notification(getCurrentLocation().path[1], {
       tag: notifyInstance._id,
diff --git a/plugins/notification-resources/src/components/NotificationPresenter.svelte b/plugins/notification-resources/src/components/NotificationPresenter.svelte
index d3dc3bb672..5cb830f5a2 100644
--- a/plugins/notification-resources/src/components/NotificationPresenter.svelte
+++ b/plugins/notification-resources/src/components/NotificationPresenter.svelte
@@ -24,7 +24,7 @@
   const store = notificationClient.docUpdatesStore
   $: docUpdate = $store.get(value._id)
 
-  $: hasNotification = (docUpdate?.txes?.length ?? 0) > 0
+  $: hasNotification = (docUpdate?.txes?.length ?? 0) > 0 && docUpdate?.hidden !== true
 </script>
 
 {#if hasNotification}
diff --git a/plugins/notification-resources/src/utils.ts b/plugins/notification-resources/src/utils.ts
index 0916ea508c..fb4d06805f 100644
--- a/plugins/notification-resources/src/utils.ts
+++ b/plugins/notification-resources/src/utils.ts
@@ -14,44 +14,35 @@
 // limitations under the License.
 //
 
-import core, { Account, Class, Doc, getCurrentAccount, Ref, Timestamp } from '@hcengineering/core'
-import notification, { DocUpdates, LastView, NotificationClient } from '@hcengineering/notification'
+import { Account, Class, Doc, getCurrentAccount, Ref } from '@hcengineering/core'
+import notification, { Collaborators, DocUpdates, NotificationClient } from '@hcengineering/notification'
 import { createQuery, getClient } from '@hcengineering/presentation'
-import { get, writable, Writable } from 'svelte/store'
+import { writable } from 'svelte/store'
 
 /**
  * @public
  */
 export class NotificationClientImpl implements NotificationClient {
   protected static _instance: NotificationClientImpl | undefined = undefined
-  private readonly lastViewsStore = writable<LastView>()
   readonly docUpdatesStore = writable<Map<Ref<Doc>, DocUpdates>>(new Map())
+  docUpdatesMap: Map<Ref<Doc>, DocUpdates> = new Map()
+  readonly docUpdates = writable<DocUpdates[]>([])
 
   private readonly docUpdatesQuery = createQuery(true)
 
-  private readonly lastViewQuery = createQuery()
   private readonly user: Ref<Account>
 
   private constructor () {
     this.user = getCurrentAccount()._id
-    this.lastViewQuery.query(notification.class.LastView, { user: this.user }, (result) => {
-      this.lastViewsStore.set(result[0])
-      if (result[0] === undefined) {
-        const client = getClient()
-        const u = client.txFactory.createTxCreateDoc(notification.class.LastView, notification.space.Notifications, {
-          user: this.user
-        })
-        u.space = core.space.DerivedTx
-        void client.tx(u)
-      }
-    })
     this.docUpdatesQuery.query(
       notification.class.DocUpdates,
       {
         user: this.user
       },
       (result) => {
-        this.docUpdatesStore.set(new Map(result.map((p) => [p.attachedTo, p])))
+        this.docUpdates.set(result)
+        this.docUpdatesMap = new Map(result.map((p) => [p.attachedTo, p]))
+        this.docUpdatesStore.set(this.docUpdatesMap)
       }
     )
   }
@@ -67,46 +58,49 @@ export class NotificationClientImpl implements NotificationClient {
     return NotificationClientImpl._instance
   }
 
-  getLastViews (): Writable<LastView> {
-    return this.lastViewsStore
-  }
-
-  async updateLastView (
-    _id: Ref<Doc>,
-    _class: Ref<Class<Doc>>,
-    time?: Timestamp,
-    force: boolean = false
-  ): Promise<void> {
+  async read (_id: Ref<Doc>): Promise<void> {
     const client = getClient()
-    const hierarchy = client.getHierarchy()
-    const mixin = hierarchy.classHierarchyMixin(_class, notification.mixin.TrackedDoc)
-    if (mixin === undefined) return
-    const lastView = time ?? new Date().getTime()
-    const obj = get(this.lastViewsStore)
-    if (obj !== undefined) {
-      const current = obj[_id] as Timestamp | undefined
-      if (current !== undefined || force) {
-        if (current === -1 && !force) return
-        if (force || (current ?? 0) < lastView) {
-          const u = client.txFactory.createTxUpdateDoc(obj._class, obj.space, obj._id, {
-            [_id]: lastView
-          })
-          u.space = core.space.DerivedTx
-          await client.tx(u)
-        }
-      }
+    const docUpdate = this.docUpdatesMap.get(_id)
+    if (docUpdate !== undefined) {
+      await client.update(docUpdate, { txes: [] })
     }
   }
 
-  async unsubscribe (_id: Ref<Doc>): Promise<void> {
+  async forceRead (_id: Ref<Doc>, _class: Ref<Class<Doc>>): Promise<void> {
     const client = getClient()
-    const obj = get(this.lastViewsStore)
-    if (obj !== undefined) {
-      const u = client.txFactory.createTxUpdateDoc(obj._class, obj.space, obj._id, {
-        [_id]: -1
-      })
-      u.space = core.space.DerivedTx
-      await client.tx(u)
+    const docUpdate = this.docUpdatesMap.get(_id)
+    if (docUpdate !== undefined) {
+      await client.update(docUpdate, { txes: [] })
+    } else {
+      const doc = await client.findOne(_class, { _id })
+      if (doc !== undefined) {
+        const hiearachy = client.getHierarchy()
+        const collab = hiearachy.as<Doc, Collaborators>(doc, notification.mixin.Collaborators)
+        if (collab.collaborators === undefined) {
+          await client.createMixin<Doc, Collaborators>(
+            collab._id,
+            collab._class,
+            collab.space,
+            notification.mixin.Collaborators,
+            {
+              collaborators: [this.user]
+            }
+          )
+        } else if (!collab.collaborators.includes(this.user)) {
+          await client.updateMixin(collab._id, collab._class, collab.space, notification.mixin.Collaborators, {
+            $push: {
+              collaborators: this.user
+            }
+          })
+        }
+        await client.createDoc(notification.class.DocUpdates, doc.space, {
+          attachedTo: _id,
+          attachedToClass: _class,
+          user: this.user,
+          hidden: true,
+          txes: []
+        })
+      }
     }
   }
 }
diff --git a/plugins/notification/src/index.ts b/plugins/notification/src/index.ts
index f4ec48eea3..85ef22d3a4 100644
--- a/plugins/notification/src/index.ts
+++ b/plugins/notification/src/index.ts
@@ -34,14 +34,6 @@ import { Writable } from './types'
 import { Preference } from '@hcengineering/preference'
 export * from './types'
 
-/**
- * @public
- */
-export interface LastView extends Doc {
-  user: Ref<Account>
-  [key: string]: any
-}
-
 /**
  * @public
  */
@@ -135,20 +127,6 @@ export interface NotificationSetting extends Preference {
   enabled: boolean
 }
 
-/**
- * @public
- */
-export interface SpaceLastEdit extends Class<Doc> {
-  lastEditField: string
-}
-
-/**
- * @public
- */
-export interface AnotherUserNotifications extends Class<Doc> {
-  fields: string[]
-}
-
 /**
  * @public
  */
@@ -156,11 +134,6 @@ export interface ClassCollaborators extends Class<Doc> {
   fields: string[] // Ref<Account> | Ref<Employee> | Ref<Account>[] | Ref<Employee>[]
 }
 
-/**
- * @public
- */
-export interface TrackedDoc extends Class<Doc> {}
-
 /**
  * @public
  */
@@ -183,8 +156,8 @@ export interface DocUpdates extends Doc {
   attachedTo: Ref<Doc>
   attachedToClass: Ref<Class<Doc>>
   hidden: boolean
-  lastTx: Ref<TxCUD<Doc>>
-  lastTxTime: Timestamp
+  lastTx?: Ref<TxCUD<Doc>>
+  lastTxTime?: Timestamp
   txes: [Ref<TxCUD<Doc>>, Timestamp][]
 }
 
@@ -198,9 +171,9 @@ export const notificationId = 'notification' as Plugin
  */
 export interface NotificationClient {
   docUpdatesStore: Writable<Map<Ref<Doc>, DocUpdates>>
-  getLastViews: () => Writable<LastView>
-  updateLastView: (_id: Ref<Doc>, _class: Ref<Class<Doc>>, time?: Timestamp, force?: boolean) => Promise<void>
-  unsubscribe: (_id: Ref<Doc>) => Promise<void>
+  docUpdates: Writable<DocUpdates[]>
+  read: (_id: Ref<Doc>) => Promise<void>
+  forceRead: (_id: Ref<Doc>, _class: Ref<Class<Doc>>, space: Ref<Space>) => Promise<void>
 }
 
 /**
@@ -213,15 +186,11 @@ export type NotificationClientFactoy = () => NotificationClient
  */
 const notification = plugin(notificationId, {
   mixin: {
-    SpaceLastEdit: '' as Ref<Mixin<SpaceLastEdit>>,
-    AnotherUserNotifications: '' as Ref<Mixin<AnotherUserNotifications>>,
     ClassCollaborators: '' as Ref<Mixin<ClassCollaborators>>,
     Collaborators: '' as Ref<Mixin<Collaborators>>,
-    TrackedDoc: '' as Ref<Mixin<TrackedDoc>>,
     NotificationObjectPresenter: '' as Ref<Mixin<NotificationObjectPresenter>>
   },
   class: {
-    LastView: '' as Ref<Class<LastView>>,
     Notification: '' as Ref<Class<Notification>>,
     EmailNotification: '' as Ref<Class<EmailNotification>>,
     NotificationType: '' as Ref<Class<NotificationType>>,
diff --git a/plugins/recruit-resources/src/components/EditVacancy.svelte b/plugins/recruit-resources/src/components/EditVacancy.svelte
index 9e6fd1e726..5e9c6fe8d6 100644
--- a/plugins/recruit-resources/src/components/EditVacancy.svelte
+++ b/plugins/recruit-resources/src/components/EditVacancy.svelte
@@ -44,7 +44,7 @@
   const notificationClient = getResource(notification.function.GetNotificationClient).then((res) => res())
 
   onDestroy(async () => {
-    notificationClient.then((client) => client.updateLastView(_id, recruit.class.Vacancy))
+    notificationClient.then((client) => client.read(_id))
   })
 
   const client = getClient()
@@ -57,7 +57,7 @@
       const prev = lastId
       lastId = _id
       if (prev) {
-        notificationClient.then((client) => client.updateLastView(prev, recruit.class.Vacancy))
+        notificationClient.then((client) => client.read(prev))
       }
       query.query(recruit.class.Vacancy, { _id }, (result) => {
         object = result[0] as Required<Vacancy>
diff --git a/plugins/telegram-resources/src/components/Chat.svelte b/plugins/telegram-resources/src/components/Chat.svelte
index 82b86da42e..d6d9650e69 100644
--- a/plugins/telegram-resources/src/components/Chat.svelte
+++ b/plugins/telegram-resources/src/components/Chat.svelte
@@ -110,7 +110,7 @@
       (res) => {
         messages = res.reverse()
         if (channel !== undefined) {
-          notificationClient.updateLastView(channel._id, channel._class, undefined, true)
+          notificationClient.read(channel._id)
         }
       },
       {
@@ -171,7 +171,7 @@
       }
     )
     if (channel !== undefined) {
-      await notificationClient.updateLastView(channel._id, channel._class, channel.modifiedOn, true)
+      await notificationClient.read(channel._id)
     }
     clear()
   }
diff --git a/plugins/tracker-resources/src/components/issues/edit/EditIssue.svelte b/plugins/tracker-resources/src/components/issues/edit/EditIssue.svelte
index 4fb2356750..a21b7d86f6 100644
--- a/plugins/tracker-resources/src/components/issues/edit/EditIssue.svelte
+++ b/plugins/tracker-resources/src/components/issues/edit/EditIssue.svelte
@@ -47,7 +47,6 @@
   export let embedded = false
 
   let lastId: Ref<Doc> = _id
-  let lastClass: Ref<Class<Doc>> = _class
   const queryClient = createQuery()
   const dispatch = createEventDispatcher()
   const client = getClient()
@@ -66,15 +65,13 @@
   function read (_id: Ref<Doc>) {
     if (lastId !== _id) {
       const prev = lastId
-      const prevClass = lastClass
       lastId = _id
-      lastClass = _class
-      notificationClient.then((client) => client.updateLastView(prev, prevClass))
+      notificationClient.then((client) => client.read(prev))
     }
   }
 
   onDestroy(async () => {
-    notificationClient.then((client) => client.updateLastView(_id, _class))
+    notificationClient.then((client) => client.read(_id))
   })
 
   $: _id &&
diff --git a/plugins/tracker-resources/src/components/templates/EditIssueTemplate.svelte b/plugins/tracker-resources/src/components/templates/EditIssueTemplate.svelte
index e115376087..fcea810aea 100644
--- a/plugins/tracker-resources/src/components/templates/EditIssueTemplate.svelte
+++ b/plugins/tracker-resources/src/components/templates/EditIssueTemplate.svelte
@@ -46,7 +46,6 @@
   export let _class: Ref<Class<IssueTemplate>>
 
   let lastId: Ref<Doc> = _id
-  let lastClass: Ref<Class<Doc>> = _class
   const query = createQuery()
   const dispatch = createEventDispatcher()
   const client = getClient()
@@ -65,15 +64,13 @@
   function read (_id: Ref<Doc>) {
     if (lastId !== _id) {
       const prev = lastId
-      const prevClass = lastClass
       lastId = _id
-      lastClass = _class
-      notificationClient.then((client) => client.updateLastView(prev, prevClass))
+      notificationClient.then((client) => client.read(prev))
     }
   }
 
   onDestroy(async () => {
-    notificationClient.then((client) => client.updateLastView(_id, _class))
+    notificationClient.then((client) => client.read(_id))
   })
 
   $: _id &&
diff --git a/plugins/view-resources/src/components/EditDoc.svelte b/plugins/view-resources/src/components/EditDoc.svelte
index 95b611bc52..b021e52967 100644
--- a/plugins/view-resources/src/components/EditDoc.svelte
+++ b/plugins/view-resources/src/components/EditDoc.svelte
@@ -44,7 +44,6 @@
 
   let realObjectClass: Ref<Class<Doc>> = _class
   let lastId: Ref<Doc> = _id
-  let lastClass: Ref<Class<Doc>> = _class
   let object: Doc
 
   const client = getClient()
@@ -55,15 +54,13 @@
   function read (_id: Ref<Doc>) {
     if (lastId !== _id) {
       const prev = lastId
-      const prevClass = lastClass
       lastId = _id
-      lastClass = _class
-      notificationClient.then((client) => client.updateLastView(prev, prevClass))
+      notificationClient.then((client) => client.read(prev))
     }
   }
 
   onDestroy(async () => {
-    notificationClient.then((client) => client.updateLastView(_id, _class))
+    notificationClient.then((client) => client.read(_id))
   })
 
   const query = createQuery()
diff --git a/plugins/workbench-resources/src/components/navigator/SpacesNav.svelte b/plugins/workbench-resources/src/components/navigator/SpacesNav.svelte
index 688e83f212..e2681558dc 100644
--- a/plugins/workbench-resources/src/components/navigator/SpacesNav.svelte
+++ b/plugins/workbench-resources/src/components/navigator/SpacesNav.svelte
@@ -15,7 +15,7 @@
 <script lang="ts">
   import type { Class, Doc, Ref, Space } from '@hcengineering/core'
   import core from '@hcengineering/core'
-  import notification, { LastView } from '@hcengineering/notification'
+  import { DocUpdates } from '@hcengineering/notification'
   import { NotificationClientImpl } from '@hcengineering/notification-resources'
   import { getResource } from '@hcengineering/platform'
   import preference from '@hcengineering/preference'
@@ -98,20 +98,13 @@
   }
 
   const notificationClient = NotificationClientImpl.getClient()
-  const lastViews = notificationClient.getLastViews()
+  const docUpdates = notificationClient.docUpdatesStore
   const hierarchy = client.getHierarchy()
-  $: clazz = hierarchy.getClass(model.spaceClass)
-  $: lastEditMixin = hierarchy.as(clazz, notification.mixin.SpaceLastEdit)
 
-  function isChanged (space: Space, lastViews: LastView): boolean {
-    const field = lastEditMixin?.lastEditField
-    const lastView = lastViews[space._id]
-    if (lastView === undefined || lastView === -1) return false
-    if (field === undefined) return false
-    const value = (space as any)[field]
-    if (isNaN(value)) return false
-
-    return lastView < value
+  function isChanged (space: Space, docUpdates: Map<Ref<Doc>, DocUpdates>): boolean {
+    const update = docUpdates.get(space._id)
+    if (update === undefined) return false
+    return update.txes.length > 0 && update.hidden !== true
   }
 
   function getParentActions (): Action[] {
@@ -147,7 +140,7 @@
               icon={classIcon(client, space._class)}
               selected={deselect ? false : currentSpace === space._id}
               actions={() => getActions(space)}
-              bold={isChanged(space, $lastViews)}
+              bold={isChanged(space, $docUpdates)}
             />
           {/await}
         </NavLink>
diff --git a/plugins/workbench-resources/src/components/navigator/StarredNav.svelte b/plugins/workbench-resources/src/components/navigator/StarredNav.svelte
index 5e6122236a..26dbf94a52 100644
--- a/plugins/workbench-resources/src/components/navigator/StarredNav.svelte
+++ b/plugins/workbench-resources/src/components/navigator/StarredNav.svelte
@@ -15,7 +15,7 @@
 <script lang="ts">
   import type { Doc, Ref, Space } from '@hcengineering/core'
   import core from '@hcengineering/core'
-  import notification, { LastView } from '@hcengineering/notification'
+  import { DocUpdates } from '@hcengineering/notification'
   import { NotificationClientImpl } from '@hcengineering/notification-resources'
   import { IntlString, getResource } from '@hcengineering/platform'
   import preference from '@hcengineering/preference'
@@ -74,20 +74,12 @@
   }
 
   const notificationClient = NotificationClientImpl.getClient()
-  const lastViews = notificationClient.getLastViews()
-  const hierarchy = client.getHierarchy()
+  const docUpdates = notificationClient.docUpdatesStore
 
-  function isChanged (space: Space, lastViews: LastView): boolean {
-    const clazz = hierarchy.getClass(space._class)
-    const lastEditMixin = hierarchy.as(clazz, notification.mixin.SpaceLastEdit)
-    const field = lastEditMixin?.lastEditField
-    const lastView = lastViews[space._id]
-    if (lastView === undefined || lastView === -1) return false
-    if (field === undefined) return false
-    const value = (space as any)[field]
-    if (isNaN(value)) return false
-
-    return lastView < value
+  function isChanged (space: Space, docUpdates: Map<Ref<Doc>, DocUpdates>): boolean {
+    const update = docUpdates.get(space._id)
+    if (update === undefined) return false
+    return update.txes.length > 0 && update.hidden !== true
   }
 </script>
 
@@ -102,7 +94,7 @@
           icon={classIcon(client, space._class)}
           selected={currentSpace === space._id}
           actions={() => getActions(space)}
-          bold={isChanged(space, $lastViews)}
+          bold={isChanged(space, $docUpdates)}
         />
       </NavLink>
     {/await}
diff --git a/server-plugins/chunter-resources/src/index.ts b/server-plugins/chunter-resources/src/index.ts
index 28666bacf6..8a4098a63e 100644
--- a/server-plugins/chunter-resources/src/index.ts
+++ b/server-plugins/chunter-resources/src/index.ts
@@ -26,7 +26,6 @@ import core, {
   Hierarchy,
   Ref,
   Tx,
-  TxCollectionCUD,
   TxCreateDoc,
   TxCUD,
   TxProcessor,
@@ -192,84 +191,11 @@ async function ThreadMessageDelete (tx: Tx, control: TriggerControl): Promise<Tx
   return [updateTx]
 }
 
-async function MessageCreate (tx: Tx, control: TriggerControl): Promise<Tx[]> {
-  const hierarchy = control.hierarchy
-  const actualTx = TxProcessor.extractTx(tx)
-  if (actualTx._class !== core.class.TxCreateDoc) return []
-  const doc = TxProcessor.createDoc2Doc(actualTx as TxCreateDoc<Doc>)
-  if (!hierarchy.isDerived(doc._class, chunter.class.Message)) {
-    return []
-  }
-
-  const message = doc as Message
-
-  const channel = (
-    await control.findAll(
-      chunter.class.ChunterSpace,
-      {
-        _id: message.space
-      },
-      { limit: 1 }
-    )
-  )[0]
-
-  if (channel?.lastMessage === undefined || channel.lastMessage < message.createOn) {
-    const res = control.txFactory.createTxUpdateDoc<ChunterSpace>(channel._class, channel.space, channel._id, {
-      lastMessage: message.createOn
-    })
-    return [res]
-  }
-  return []
-}
-
-async function MessageDelete (tx: Tx, control: TriggerControl): Promise<Tx[]> {
-  const hierarchy = control.hierarchy
-
-  const rmTx = TxProcessor.extractTx(tx) as TxCollectionCUD<ChunterSpace, Message>
-  if (rmTx._class !== core.class.TxRemoveDoc) return []
-  if (!hierarchy.isDerived(rmTx.objectClass, chunter.class.Message)) {
-    return []
-  }
-
-  const message = control.removedMap.get(rmTx.objectId) as Message
-
-  if (message === undefined) {
-    return []
-  }
-
-  const channel = (
-    await control.findAll(
-      chunter.class.ChunterSpace,
-      {
-        _id: message.space
-      },
-      { limit: 1 }
-    )
-  )[0]
-
-  if (channel?.lastMessage === message.createOn) {
-    const messages = await control.findAll(chunter.class.Message, {
-      attachedTo: channel._id
-    })
-    const lastMessageDate = messages.reduce((maxDate, mess) => (mess.createOn > maxDate ? mess.createOn : maxDate), 0)
-
-    const updateTx = control.txFactory.createTxUpdateDoc<ChunterSpace>(channel._class, channel.space, channel._id, {
-      lastMessage: lastMessageDate > 0 ? lastMessageDate : undefined
-    })
-
-    return [updateTx]
-  }
-
-  return []
-}
-
 /**
  * @public
  */
 export async function ChunterTrigger (tx: Tx, control: TriggerControl): Promise<Tx[]> {
   const promises = [
-    MessageCreate(tx, control),
-    MessageDelete(tx, control),
     ThreadMessageCreate(tx, control),
     ThreadMessageDelete(tx, control),
     CommentCreate(tx as TxCUD<Doc>, control)
diff --git a/server-plugins/gmail-resources/src/index.ts b/server-plugins/gmail-resources/src/index.ts
index 879d9e898e..1b5c6bbdd2 100644
--- a/server-plugins/gmail-resources/src/index.ts
+++ b/server-plugins/gmail-resources/src/index.ts
@@ -100,7 +100,7 @@ export async function OnMessageCreate (tx: Tx, control: TriggerControl): Promise
       }
       if (docs.length === 0) {
         res.push(
-          control.txFactory.createTxCreateDoc(notification.class.DocUpdates, notification.space.Notifications, {
+          control.txFactory.createTxCreateDoc(notification.class.DocUpdates, channel.space, {
             user: tx.modifiedBy,
             attachedTo: channel._id,
             attachedToClass: channel._class,
diff --git a/server-plugins/notification-resources/src/index.ts b/server-plugins/notification-resources/src/index.ts
index 10bf804dfb..172fec3249 100644
--- a/server-plugins/notification-resources/src/index.ts
+++ b/server-plugins/notification-resources/src/index.ts
@@ -45,7 +45,6 @@ import notification, {
   Collaborators,
   DocUpdates,
   EmailNotification,
-  LastView,
   NotificationProvider,
   NotificationType
 } from '@hcengineering/notification'
@@ -54,7 +53,6 @@ import type { TriggerControl } from '@hcengineering/server-core'
 import serverNotification, {
   HTMLPresenter,
   TextPresenter,
-  createLastViewTx,
   getEmployeeAccount,
   getEmployeeAccountById
 } from '@hcengineering/server-notification'
@@ -254,62 +252,6 @@ async function getEmailNotificationTx (
   }
 }
 
-/**
- * @public
- */
-export async function UpdateLastView (tx: Tx, control: TriggerControl): Promise<Tx[]> {
-  const actualTx = TxProcessor.extractTx(tx)
-  if (actualTx._class !== core.class.TxRemoveDoc) {
-    return []
-  }
-
-  if ((actualTx as TxCUD<Doc>).objectClass === notification.class.LastView) {
-    return []
-  }
-
-  const result: Tx[] = []
-
-  const removeTx = actualTx as TxRemoveDoc<Doc>
-  const lastViews = await control.findAll(notification.class.LastView, { [removeTx.objectId]: { $exists: true } })
-  for (const lastView of lastViews) {
-    const clearTx = control.txFactory.createTxUpdateDoc(lastView._class, lastView.space, lastView._id, {
-      $unset: {
-        [removeTx.objectId]: ''
-      }
-    })
-    result.push(clearTx)
-  }
-  return result
-}
-
-/**
- * @public
- */
-export async function OnUpdateLastView (tx: Tx, control: TriggerControl): Promise<Tx[]> {
-  const actualTx = TxProcessor.extractTx(tx) as TxUpdateDoc<LastView>
-  if (actualTx._class !== core.class.TxUpdateDoc) return []
-  if (actualTx.objectClass !== notification.class.LastView) return []
-  const result: Tx[] = []
-  const lastView = (await control.findAll(notification.class.LastView, { _id: actualTx.objectId }))[0]
-  if (lastView === undefined) return result
-  for (const key in actualTx.operations) {
-    const docs = await control.findAll(notification.class.DocUpdates, {
-      attachedTo: key as Ref<Doc>,
-      user: lastView.user
-    })
-    for (const doc of docs) {
-      const txes = doc.txes.filter((p) => p[1] > actualTx.operations[key])
-      result.push(
-        control.txFactory.createTxUpdateDoc(doc._class, doc.space, doc._id, {
-          txes
-        })
-      )
-    }
-  }
-
-  return result
-}
-
 function getBacklink (ptx: TxCollectionCUD<Doc, Backlink>): Backlink {
   return TxProcessor.createDoc2Doc(ptx.tx as TxCreateDoc<Backlink>)
 }
@@ -493,7 +435,7 @@ async function getNotificationTxes (
     const current = docUpdates.find((p) => p.user === target)
     if (current === undefined) {
       res.push(
-        control.txFactory.createTxCreateDoc(notification.class.DocUpdates, notification.space.Notifications, {
+        control.txFactory.createTxCreateDoc(notification.class.DocUpdates, object.space, {
           user: target,
           attachedTo: object._id,
           attachedToClass: object._class,
@@ -709,6 +651,17 @@ function isMixinTx (tx: TxUpdateDoc<Doc> | TxMixin<Doc, Doc>): tx is TxMixin<Doc
   return tx._class === core.class.TxMixin
 }
 
+async function changeSpaceTxes (control: TriggerControl, tx: TxUpdateDoc<Doc> | TxMixin<Doc, Doc>): Promise<Tx[]> {
+  if (tx._class !== core.class.TxUpdateDoc) return []
+  const ctx = tx as TxUpdateDoc<Doc>
+  if (ctx.operations.space === undefined) return []
+  const docUpdates = await control.findAll(notification.class.DocUpdates, { attachedTo: tx.objectId })
+
+  return docUpdates.map((value) =>
+    control.txFactory.createTxUpdateDoc(value._class, value.space, value._id, { space: ctx.operations.space })
+  )
+}
+
 async function updateCollaboratorDoc (
   tx: TxUpdateDoc<Doc> | TxMixin<Doc, Doc>,
   control: TriggerControl,
@@ -750,47 +703,11 @@ async function updateCollaboratorDoc (
 
   res = res.concat(await getSpaceCollabTxes(control, doc, tx, originTx))
 
+  res = res.concat(await changeSpaceTxes(control, tx))
+
   return res
 }
 
-/**
- * @public
- */
-export async function OnAddCollborator (tx: Tx, control: TriggerControl): Promise<Tx[]> {
-  const result: Tx[] = []
-  const actualTx = TxProcessor.extractTx(tx) as TxMixin<Doc, Collaborators>
-
-  if (actualTx._class !== core.class.TxMixin) return []
-  if (actualTx.mixin !== notification.mixin.Collaborators) return []
-  if (actualTx.attributes.collaborators !== undefined) {
-    for (const collab of actualTx.attributes.collaborators) {
-      const resTx = await createLastViewTx(control.findAll, actualTx.objectId, collab)
-      if (resTx !== undefined) {
-        result.push(resTx)
-      }
-    }
-  }
-  if (actualTx.attributes.$push?.collaborators !== undefined) {
-    const collab = actualTx.attributes.$push?.collaborators
-    if (typeof collab === 'object') {
-      if ('$each' in collab) {
-        for (const collaborator of collab.$each) {
-          const resTx = await createLastViewTx(control.findAll, actualTx.objectId, collaborator)
-          if (resTx !== undefined) {
-            result.push(resTx)
-          }
-        }
-      }
-    } else {
-      const resTx = await createLastViewTx(control.findAll, actualTx.objectId, collab)
-      if (resTx !== undefined) {
-        result.push(resTx)
-      }
-    }
-  }
-  return result
-}
-
 /**
  * @public
  */
@@ -897,9 +814,6 @@ export default async () => ({
   trigger: {
     OnBacklinkCreate,
     CollaboratorDocHandler: collaboratorDocHandler,
-    OnUpdateLastView,
-    UpdateLastView,
-    OnAddCollborator,
     OnAttributeCreate,
     OnAttributeUpdate
   },
diff --git a/server-plugins/notification/src/index.ts b/server-plugins/notification/src/index.ts
index 8b90548fcd..b4f3ea024e 100644
--- a/server-plugins/notification/src/index.ts
+++ b/server-plugins/notification/src/index.ts
@@ -15,8 +15,8 @@
 //
 
 import contact, { Employee, EmployeeAccount } from '@hcengineering/contact'
-import { Account, Class, Doc, Mixin, Ref, Tx, TxCreateDoc, TxFactory, TxUpdateDoc } from '@hcengineering/core'
-import notification, { LastView, NotificationType } from '@hcengineering/notification'
+import { Account, Class, Doc, Mixin, Ref, Tx } from '@hcengineering/core'
+import { NotificationType } from '@hcengineering/notification'
 import { Plugin, Resource, plugin } from '@hcengineering/platform'
 import type { TriggerControl, TriggerFunc } from '@hcengineering/server-core'
 
@@ -25,42 +25,6 @@ import type { TriggerControl, TriggerFunc } from '@hcengineering/server-core'
  */
 export const serverNotificationId = 'server-notification' as Plugin
 
-/**
- * @public
- */
-export async function getUpdateLastViewTx (
-  findAll: TriggerControl['findAll'],
-  attachedTo: Ref<Doc>,
-  lastView: number,
-  user: Ref<Account>
-): Promise<TxUpdateDoc<LastView> | TxCreateDoc<LastView> | undefined> {
-  const current = (
-    await findAll(
-      notification.class.LastView,
-      {
-        user
-      },
-      { limit: 1 }
-    )
-  )[0]
-  const factory = new TxFactory(user, true)
-  if (current !== undefined) {
-    if (current[attachedTo] === -1 || current[attachedTo] >= lastView) {
-      return
-    }
-    const u = factory.createTxUpdateDoc(current._class, current.space, current._id, {
-      [attachedTo]: lastView
-    })
-    return u
-  } else {
-    const u = factory.createTxCreateDoc(notification.class.LastView, notification.space.Notifications, {
-      user,
-      [attachedTo]: lastView
-    })
-    return u
-  }
-}
-
 /**
  * @public
  */
@@ -115,38 +79,6 @@ export async function getEmployee (employee: Ref<Employee>, control: TriggerCont
   return account
 }
 
-/**
- * @public
- */
-export async function createLastViewTx (
-  findAll: TriggerControl['findAll'],
-  attachedTo: Ref<Doc>,
-  user: Ref<Account>
-): Promise<TxCreateDoc<LastView> | TxUpdateDoc<LastView> | undefined> {
-  const current = (
-    await findAll(
-      notification.class.LastView,
-      {
-        user
-      },
-      { limit: 1 }
-    )
-  )[0]
-  const factory = new TxFactory(user, true)
-  if (current === undefined) {
-    const u = factory.createTxCreateDoc(notification.class.LastView, notification.space.Notifications, {
-      user,
-      [attachedTo]: 1
-    })
-    return u
-  } else if (current[attachedTo] === undefined) {
-    const u = factory.createTxUpdateDoc(current._class, current.space, current._id, {
-      [attachedTo]: 1
-    })
-    return u
-  }
-}
-
 /**
  * @public
  */
@@ -191,10 +123,7 @@ export default plugin(serverNotificationId, {
   },
   trigger: {
     OnBacklinkCreate: '' as Resource<TriggerFunc>,
-    UpdateLastView: '' as Resource<TriggerFunc>,
-    OnUpdateLastView: '' as Resource<TriggerFunc>,
     CollaboratorDocHandler: '' as Resource<TriggerFunc>,
-    OnAddCollborator: '' as Resource<TriggerFunc>,
     OnAttributeCreate: '' as Resource<TriggerFunc>,
     OnAttributeUpdate: '' as Resource<TriggerFunc>
   },
diff --git a/server-plugins/telegram-resources/src/index.ts b/server-plugins/telegram-resources/src/index.ts
index e5e2a46c00..3373fabb31 100644
--- a/server-plugins/telegram-resources/src/index.ts
+++ b/server-plugins/telegram-resources/src/index.ts
@@ -101,7 +101,7 @@ export async function OnMessageCreate (tx: Tx, control: TriggerControl): Promise
       }
       if (docs.length === 0) {
         res.push(
-          control.txFactory.createTxCreateDoc(notification.class.DocUpdates, notification.space.Notifications, {
+          control.txFactory.createTxCreateDoc(notification.class.DocUpdates, channel.space, {
             user: tx.modifiedBy,
             attachedTo: channel._id,
             attachedToClass: channel._class,