diff --git a/packages/presentation/src/components/message/Nodes.svelte b/packages/presentation/src/components/message/Nodes.svelte
index beba86986e..3b469bb3eb 100644
--- a/packages/presentation/src/components/message/Nodes.svelte
+++ b/packages/presentation/src/components/message/Nodes.svelte
@@ -86,17 +86,22 @@
         </div>
       {/if}
     {:else if node.nodeName === 'SPAN'}
-      <Component
-        is={view.component.ObjectPresenter}
-        props={{
-          objectId: node.getAttribute('data-id'),
-          title: node.getAttribute('data-label'),
-          _class: node.getAttribute('data-objectclass'),
-          props: {
-            shouldShowAvatar: false
-          }
-        }}
-      />
+      <span style={node.getAttribute('style')}>
+        <svelte:self nodes={node.childNodes} />
+        {#if node.getAttribute('data-objectclass') !== undefined && node.getAttribute('data-id') !== undefined}
+          <Component
+            is={view.component.ObjectPresenter}
+            props={{
+              objectId: node.getAttribute('data-id'),
+              title: node.getAttribute('data-label'),
+              _class: node.getAttribute('data-objectclass'),
+              props: {
+                shouldShowAvatar: false
+              }
+            }}
+          />
+        {/if}
+      </span>
     {:else if node.nodeName === 'TABLE'}
       <table class={node.className}><svelte:self nodes={node.childNodes} /></table>
     {:else if node.nodeName === 'TBODY'}
diff --git a/plugins/bitrix-resources/src/components/BitrixConfigure.svelte b/plugins/bitrix-resources/src/components/BitrixConfigure.svelte
index e50818c5ca..e1fb713165 100644
--- a/plugins/bitrix-resources/src/components/BitrixConfigure.svelte
+++ b/plugins/bitrix-resources/src/components/BitrixConfigure.svelte
@@ -15,14 +15,22 @@
 //
 -->
 <script lang="ts">
-  import presentation, { Card, createQuery } from '@hcengineering/presentation'
+  import presentation, { Card, createQuery, getClient } from '@hcengineering/presentation'
   import { Integration } from '@hcengineering/setting'
   import { createEventDispatcher, onMount } from 'svelte'
   import bitrix from '../plugin'
 
-  import { BitrixClient, BitrixEntityMapping, BitrixProfile, StatusValue } from '@hcengineering/bitrix'
+  import {
+    BitrixClient,
+    BitrixEntityMapping,
+    BitrixFieldMapping,
+    BitrixProfile,
+    StatusValue
+  } from '@hcengineering/bitrix'
   import { Button, eventToHTMLElement, IconAdd, showPopup } from '@hcengineering/ui'
 
+  import { Data, Doc, Ref } from '@hcengineering/core'
+  import { getEmbeddedLabel } from '@hcengineering/platform'
   import { bitrixQueue } from '../queue'
   import CreateMapping from './CreateMapping.svelte'
   import EntityMapping from './EntityMapping.svelte'
@@ -47,6 +55,9 @@
     })
   })
 
+  let inputFile: HTMLInputElement
+  const client = getClient()
+
   const mQuery = createQuery()
 
   let mappings: BitrixEntityMapping[] = []
@@ -57,6 +68,68 @@
   function addMapping (evt: MouseEvent): void {
     showPopup(CreateMapping, { integration, mappings, bitrixClient }, eventToHTMLElement(evt))
   }
+  const signature = '@#253heyf@'
+  const downloadConfig = async () => {
+    const filename = 'bitrix-config_' + new Date().toLocaleDateString() + '.json'
+    const link = document.createElement('a')
+    const fields = await client.findAll(bitrix.class.FieldMapping, {})
+    link.style.display = 'none'
+    link.setAttribute('target', '_blank')
+    link.setAttribute(
+      'href',
+      'data:text/json;charset=utf-8,%EF%BB%BF' +
+        encodeURIComponent(JSON.stringify({ mappings, fields, signature }, undefined, 2))
+    )
+    link.setAttribute('download', filename)
+    document.body.appendChild(link)
+    link.click()
+    document.body.removeChild(link)
+  }
+  const replaceConfig = async () => {
+    inputFile.click()
+  }
+
+  const fileSelected = async () => {
+    const file = inputFile.files?.[0]
+    const text = await file?.text()
+    if (text === undefined) {
+      return
+    }
+    const jsonParsed = JSON.parse(text)
+    if (jsonParsed.signature !== signature) {
+      return
+    }
+
+    const op = client.apply('bitrix')
+    // Remove all stuff
+    for (const d of await (
+      await client.findAll<Doc>(bitrix.class.EntityMapping, {})
+    ).concat(...(await client.findAll<Doc>(bitrix.class.FieldMapping, {})))) {
+      await op.remove(d)
+    }
+
+    // Import new items.
+    const mappings = jsonParsed.mappings as BitrixEntityMapping[]
+    for (const m of mappings) {
+      const { _class, space, _id, ...dta } = m
+      await op.tx(op.txFactory.createTxCreateDoc(_class, space, dta, _id))
+    }
+    const fields = jsonParsed.fields as BitrixFieldMapping[]
+    for (const m of fields) {
+      const { _class, space, _id, attachedTo, attachedToClass, collection, modifiedBy, modifiedOn, ...dta } = m
+      const cr = op.txFactory.createTxCreateDoc<BitrixFieldMapping>(_class, space, dta as Data<BitrixFieldMapping>, _id)
+      const col = op.txFactory.createTxCollectionCUD<BitrixEntityMapping, BitrixFieldMapping>(
+        attachedToClass,
+        attachedTo as Ref<BitrixEntityMapping>,
+        space,
+        collection,
+        cr
+      )
+      await op.tx(col)
+    }
+
+    await op.commit()
+  }
 </script>
 
 <Card
@@ -78,15 +151,20 @@
     {/if}
   </svelte:fragment>
   {#if profile}
-    <div class="flex flex-reverse flex-grab">
-      <Button icon={IconAdd} label={presentation.string.Add} on:click={addMapping} />
-    </div>
     <div class="flex-row">
       {#each mappings as mapping}
         <EntityMapping {mapping} {bitrixClient} {statusList} />
       {/each}
     </div>
   {/if}
-  <!-- <EditBox label={bitrix.string.BitrixTokenUrl} bind:value={url} /> -->
-  <svelte:fragment slot="pool" />
+  <svelte:fragment slot="pool">
+    <div class="flex-row-center flex-grow flex-between">
+      <Button icon={IconAdd} label={presentation.string.Add} on:click={addMapping} />
+      <div class="flex-row-center">
+        <Button label={getEmbeddedLabel('Download...')} on:click={downloadConfig} />
+        <Button label={getEmbeddedLabel('Replace...')} on:click={replaceConfig} />
+        <input bind:this={inputFile} type="file" name="file" id="file" style="display: none" on:change={fileSelected} />
+      </div>
+    </div>
+  </svelte:fragment>
 </Card>
diff --git a/plugins/bitrix-resources/src/components/FieldMappingSynchronizer.svelte b/plugins/bitrix-resources/src/components/FieldMappingSynchronizer.svelte
index e7301e998c..d48784c10e 100644
--- a/plugins/bitrix-resources/src/components/FieldMappingSynchronizer.svelte
+++ b/plugins/bitrix-resources/src/components/FieldMappingSynchronizer.svelte
@@ -3,6 +3,7 @@
     BitrixClient,
     BitrixEntityMapping,
     BitrixFieldMapping,
+    defaultSyncPeriod,
     Fields,
     performSynchronization,
     StatusValue,
@@ -34,6 +35,7 @@
   let direction: 'ASC' | 'DSC' = 'ASC'
   let limit = 1
   let space: Ref<Space> | undefined
+  let syncPeriod = defaultSyncPeriod
 
   export let loading = false
   let state = ''
@@ -67,7 +69,8 @@
           docsProcessed++
           state = `processed: ${docsProcessed}/${total ?? 1}`
         },
-        extraFilter: filterFields.length === 0 ? undefined : mappedFilter
+        extraFilter: filterFields.length === 0 ? undefined : mappedFilter,
+        syncPeriod
       })
     } catch (err: any) {
       state = err.message
@@ -141,6 +144,17 @@
       ]}
       bind:selected={direction}
     />
+    <NumberEditor
+      kind={'button'}
+      value={syncPeriod}
+      focus={false}
+      placeholder={getEmbeddedLabel('Period')}
+      onChange={(val) => {
+        if (val) {
+          syncPeriod = val
+        }
+      }}
+    />
     <div class="fs-title">
       <NumberEditor
         kind={'button'}
diff --git a/plugins/bitrix/src/sync.ts b/plugins/bitrix/src/sync.ts
index 32fdc884e6..3c57ce5704 100644
--- a/plugins/bitrix/src/sync.ts
+++ b/plugins/bitrix/src/sync.ts
@@ -132,15 +132,22 @@ export async function syncDocument (
     for (const [cl, vals] of byClass.entries()) {
       if (applyOp.getHierarchy().isDerived(cl, core.class.AttachedDoc)) {
         const existingByClass = await client.findAll(cl, {
-          attachedTo: resultDoc.document._id,
-          [bitrix.mixin.BitrixSyncDoc + '.bitrixId']: { $in: vals.map((it) => it.bitrixId) }
+          attachedTo: resultDoc.document._id
         })
 
         for (const valValue of vals) {
-          const existing = existingByClass.find(
+          const existingIdx = existingByClass.findIndex(
             (it) => hierarchy.as<Doc, BitrixSyncDoc>(it, bitrix.mixin.BitrixSyncDoc).bitrixId === valValue.bitrixId
           )
-          await updateAttachedDoc(existing, applyOp, valValue)
+          if (existingIdx >= 0) {
+            const existing = existingByClass.splice(existingIdx, 1).shift()
+            await updateAttachedDoc(existing, applyOp, valValue)
+          }
+        }
+
+        // Remove previous merged documents, probable they are deleted in bitrix or wrongly migrated.
+        for (const doc of existingByClass) {
+          await client.remove(doc)
         }
       }
     }
@@ -355,8 +362,10 @@ export function processComment (comment: string): string {
   return comment
 }
 
-// 1 day
-const syncPeriod = 1000 * 60 * 60 * 24
+/**
+ * @public
+ */
+export const defaultSyncPeriod = 1000 * 60 * 60 * 24
 
 /**
  * @public
@@ -373,6 +382,7 @@ export interface SyncOptions {
   monitor: (total: number) => void
   blobProvider?: (blobRef: { file: string, id: string }) => Promise<Blob | undefined>
   extraFilter?: Record<string, any>
+  syncPeriod?: number
 }
 interface SyncOptionsExtra {
   ownerTypeValues: BitrixOwnerType[]
@@ -471,7 +481,7 @@ async function doPerformSync (ops: SyncOptions & SyncOptionsExtra): Promise<Bitr
         )
         if (existingDoc !== undefined) {
           const bd = ops.client.getHierarchy().as(existingDoc, bitrix.mixin.BitrixSyncDoc)
-          if (bd.syncTime !== undefined && bd.syncTime + syncPeriod > syncTime) {
+          if (bd.syncTime !== undefined && bd.syncTime + (ops.syncPeriod ?? defaultSyncPeriod) > syncTime) {
             // No need to sync, sime sync time is not yet arrived.
             toProcess.splice(0, 1)
             added++
@@ -694,14 +704,14 @@ async function downloadComments (
   for (const comm of cr) {
     const cummunications = comm.COMMUNICATIONS?.map((it) => it.ENTITY_SETTINGS?.LEAD_TITLE ?? '')
     let message = `<p>
-        e-mail: ${cummunications?.join(',') ?? ''}<br/>\n
-        Subject: ${comm.SUBJECT}<br/>\n`
+        <span style="color: var(--primary-color-skyblue);">e-mail: ${cummunications?.join(',') ?? ''}</span><br/>\n
+        <span style="color: var(--primary-color-skyblue);">Subject: ${comm.SUBJECT}</span><br/>\n`
 
     for (const [k, v] of Object.entries(comm.SETTINGS?.EMAIL_META ?? {}).concat(
       Object.entries(comm.SETTINGS?.MESSAGE_HEADERS ?? {})
     )) {
       if (v.trim().length > 0) {
-        message += `<div>${k}: ${v}</div><br/>\n`
+        message += `<span style="color: var(--primary-color-skyblue);">${k}: ${v}</span><br/>\n`
       }
     }
     message += '</p>' + comm.DESCRIPTION
diff --git a/pods/account/src/index.ts b/pods/account/src/index.ts
index a8da0f7151..001872d378 100644
--- a/pods/account/src/index.ts
+++ b/pods/account/src/index.ts
@@ -106,6 +106,7 @@ export function serveAccount (methods: Record<string, AccountMethod>, productId
 
   const close = (): void => {
     server.close()
+    process.exit(0)
   }
 
   process.on('uncaughtException', (e) => {
diff --git a/server/core/src/indexer/indexer.ts b/server/core/src/indexer/indexer.ts
index 649bf60efe..6eae7057b1 100644
--- a/server/core/src/indexer/indexer.ts
+++ b/server/core/src/indexer/indexer.ts
@@ -516,5 +516,18 @@ export class FullTextIndexPipeline implements FullTextPipeline {
         .map((it) => it._id)
       await this.storage.clean(DOMAIN_DOC_INDEX_STATE, docIds)
     }
+
+    // Clean for non existing clases
+
+    const unknownClasses = (
+      await this.storage.findAll(
+        core.class.DocIndexState,
+        { objectClass: { $nin: allClasses } },
+        { projection: { _id: 1 } }
+      )
+    ).map((it) => it._id)
+    if (unknownClasses.length > 0) {
+      await this.storage.clean(DOMAIN_DOC_INDEX_STATE, unknownClasses)
+    }
   }
 }