diff --git a/packages/account-client/src/client.ts b/packages/account-client/src/client.ts
index 1f0fbfb14e..268dd4dc52 100644
--- a/packages/account-client/src/client.ts
+++ b/packages/account-client/src/client.ts
@@ -97,6 +97,14 @@ export interface AccountClient {
   ) => Promise<WorkspaceLoginInfo>
   join: (email: string, password: string, inviteId: string, workspaceUrl: string) => Promise<WorkspaceLoginInfo>
   createInvite: (exp: number, emailMask: string, limit: number, role: AccountRole) => Promise<string>
+  /**
+   * @param options.personalized
+   * If true, will generate a link with a personalized token for one person access
+   * If false, will generate a link with an open-ended account in the token. Every token use will generate a new account.
+   * When false, notBefore and expiration parameters are mandatory.
+   * @param options.notBefore - not valid before; timestamp in seconds
+   * @param options.expiration - expires after; timestamp in seconds
+   */
   createAccessLink: (
     role: AccountRole,
     options?: {
@@ -105,6 +113,9 @@ export interface AccountClient {
       navigateUrl?: string
       extra?: Record<string, any>
       spaces?: string[]
+      notBefore?: number
+      expiration?: number
+      personalized?: boolean
     }
   ) => Promise<string>
   checkJoin: (inviteId: string) => Promise<WorkspaceLoginInfo>
@@ -435,6 +446,9 @@ class AccountClientImpl implements AccountClient {
       navigateUrl?: string
       extra?: Record<string, any>
       spaces?: string[]
+      notBefore?: number
+      expiration?: number
+      personalized?: boolean
     }
   ): Promise<string> {
     const params: any = { ...(options ?? {}), role }
diff --git a/packages/platform/src/platform.ts b/packages/platform/src/platform.ts
index c4e9116aa6..93a7d3abfa 100644
--- a/packages/platform/src/platform.ts
+++ b/packages/platform/src/platform.ts
@@ -141,6 +141,8 @@ export default plugin(platformId, {
     BadRequest: '' as StatusCode,
     Forbidden: '' as StatusCode, // 403
     Unauthorized: '' as StatusCode, // 401
+    TokenExpired: '' as StatusCode, // 401
+    TokenNotActive: '' as StatusCode<{ notBefore: number }>, // 401
     Conflict: '' as StatusCode, // 409
     ExpiredLink: '' as StatusCode,
     UnknownMethod: '' as StatusCode<{ method: string }>,
diff --git a/packages/ui/src/components/TimeLeft.svelte b/packages/ui/src/components/TimeLeft.svelte
index 1ca3d3e14c..813fbfcb44 100644
--- a/packages/ui/src/components/TimeLeft.svelte
+++ b/packages/ui/src/components/TimeLeft.svelte
@@ -17,13 +17,18 @@
   import { createEventDispatcher, onDestroy } from 'svelte'
   import { Timestamp } from '@hcengineering/core'
 
+  import { Label } from '..'
+  import ui from '../plugin'
+
   export let time: Timestamp
+  export let showHours = false
 
   const dispatch = createEventDispatcher()
 
   let displayTime = time
   let notified = false
   let intervalId: any | undefined = undefined
+  const dayMs = 1000 * 60 * 60 * 24
 
   function applyTimer (time: number): void {
     if (intervalId !== undefined) {
@@ -56,11 +61,19 @@
 
   function getDisplayTime (time: number): string {
     const options: Intl.DateTimeFormatOptions = { minute: 'numeric', second: 'numeric' }
+    if (showHours) {
+      options.timeZone = 'UTC'
+      options.hour = 'numeric'
+    }
 
     return new Date(time).toLocaleString('default', options)
   }
 </script>
 
 {#if displayTime > 0}
-  {getDisplayTime(displayTime)}
+  {#if displayTime < dayMs}
+    {getDisplayTime(displayTime)}
+  {:else}
+    <Label label={ui.string.Days} params={{ days: Math.floor(displayTime / dayMs) }} />
+  {/if}
 {/if}
diff --git a/plugins/login-assets/lang/cs.json b/plugins/login-assets/lang/cs.json
index 4069bfa4d4..c166cc5cd6 100644
--- a/plugins/login-assets/lang/cs.json
+++ b/plugins/login-assets/lang/cs.json
@@ -75,6 +75,8 @@
     "SetPasswordNow": "Nastavím heslo nyní",
     "LoginAsGuest": "Pokračovat jako host",
     "SignUpToCreateWorkspace": "Neexistují žádné pracovní prostory s přístupem pro hosty. Prosím, zaregistrujte se a vytvořte si vlastní.",
-    "WhatIsYourName": "Jak se jmenujete?"
+    "WhatIsYourName": "Jak se jmenujete?",
+    "AccessExpired": "Doba přístupu vypršela. Požádejte prosím o nový odkaz pro přístup.",
+    "AccessNotActive": "Doba přístupu ještě nezačala. Začíná za: "
   }
 }
diff --git a/plugins/login-assets/lang/de.json b/plugins/login-assets/lang/de.json
index 73450b0bef..01f405251a 100644
--- a/plugins/login-assets/lang/de.json
+++ b/plugins/login-assets/lang/de.json
@@ -75,6 +75,8 @@
     "SetPasswordNow": "Ich werde jetzt ein Passwort festlegen",
     "LoginAsGuest": "Als Gast fortfahren",
     "SignUpToCreateWorkspace": "Keine Arbeitsbereiche mit Gastzugang. Bitte registrieren Sie sich, um Ihren eigenen zu erstellen.",
-    "WhatIsYourName": "Wie ist Ihr Name?"
+    "WhatIsYourName": "Wie ist Ihr Name?",
+    "AccessExpired": "Zugriffszeit abgelaufen. Bitte fragen Sie nach einem neuen Zugangslink.",
+    "AccessNotActive": "Zugriffszeit hat noch nicht begonnen. Sie beginnt in: "
   }
 }
diff --git a/plugins/login-assets/lang/en.json b/plugins/login-assets/lang/en.json
index 19f149429b..c0ed5e7ab1 100644
--- a/plugins/login-assets/lang/en.json
+++ b/plugins/login-assets/lang/en.json
@@ -74,6 +74,8 @@
     "SetPasswordNow": "I'll set a password now",
     "LoginAsGuest": "Continue as a guest",
     "SignUpToCreateWorkspace": "There are no workspaces with guest access. Please sign up to create your own.",
-    "WhatIsYourName": "What is your name?"
+    "WhatIsYourName": "What is your name?",
+    "AccessExpired": "Access time expired. Please ask for a new access link.",
+    "AccessNotActive": "Access time hasn't started yet. It is starting in: "
   }
 }
diff --git a/plugins/login-assets/lang/es.json b/plugins/login-assets/lang/es.json
index 73bff8eaac..51af45f2e9 100644
--- a/plugins/login-assets/lang/es.json
+++ b/plugins/login-assets/lang/es.json
@@ -74,6 +74,8 @@
     "SetPasswordNow": "Estableceré una contraseña ahora",
     "LoginAsGuest": "Continuar como invitado",
     "SignUpToCreateWorkspace": "No hay espacios de trabajo con acceso de invitado. Por favor, regístrese para crear el suyo.",
-    "WhatIsYourName": "¿Cuál es su nombre?"
+    "WhatIsYourName": "¿Cuál es su nombre?",
+    "AccessExpired": "El tiempo de acceso ha expirado. Por favor, solicite un nuevo enlace de acceso.",
+    "AccessNotActive": "El tiempo de acceso aún no ha comenzado. Comienza en: "
   }
 }
diff --git a/plugins/login-assets/lang/fr.json b/plugins/login-assets/lang/fr.json
index 3edd660840..91f82036c3 100644
--- a/plugins/login-assets/lang/fr.json
+++ b/plugins/login-assets/lang/fr.json
@@ -74,6 +74,8 @@
     "SetPasswordNow": "Je définirai un mot de passe maintenant",
     "LoginAsGuest": "Continuer en tant qu'invité",
     "SignUpToCreateWorkspace": "Aucun espace de travail avec accès invité. Veuillez vous inscrire pour créer le vôtre.",
-    "WhatIsYourName": "Quel est votre nom ?"
+    "WhatIsYourName": "Quel est votre nom ?",
+    "AccessExpired": "Le temps d'accès a expiré. Veuillez demander un nouveau lien d'accès.",
+    "AccessNotActive": "Le temps d'accès n'a pas encore commencé. Il commence dans : "
   }
 }
diff --git a/plugins/login-assets/lang/it.json b/plugins/login-assets/lang/it.json
index 422fba7816..6b5e574594 100644
--- a/plugins/login-assets/lang/it.json
+++ b/plugins/login-assets/lang/it.json
@@ -74,6 +74,8 @@
     "SetPasswordNow": "Imposterò una password ora",
     "LoginAsGuest": "Continua come ospite",
     "SignUpToCreateWorkspace": "Nessuna area di lavoro con accesso ospite. Per favore, registrati per crearne una tua.",
-    "WhatIsYourName": "Come ti chiami?"
+    "WhatIsYourName": "Come ti chiami?",
+    "AccessExpired": "Il tempo di accesso è scaduto. Per favore, richiedi un nuovo link di accesso.",
+    "AccessNotActive": "Il tempo di accesso non è ancora iniziato. Inizia tra: "
   }
 }
diff --git a/plugins/login-assets/lang/ja.json b/plugins/login-assets/lang/ja.json
index 59289fd6dd..7dd4b3937c 100644
--- a/plugins/login-assets/lang/ja.json
+++ b/plugins/login-assets/lang/ja.json
@@ -74,6 +74,8 @@
     "SetPasswordNow": "今すぐパスワードを設定します",
     "LoginAsGuest": "ゲストとして続行",
     "SignUpToCreateWorkspace": "ゲストアクセス可能なワークスペースはありません。登録して独自のワークスペースを作成してください。",
-    "WhatIsYourName": "お名前は何ですか？"
+    "WhatIsYourName": "お名前は何ですか？",
+    "AccessExpired": "アクセス時間が期限切れです。新しいアクセスリンクをリクエストしてください。",
+    "AccessNotActive": "アクセス時間はまだ開始されていません。開始まで: "
   }
 }
diff --git a/plugins/login-assets/lang/pt.json b/plugins/login-assets/lang/pt.json
index 0f9d1bc821..0783a4f93c 100644
--- a/plugins/login-assets/lang/pt.json
+++ b/plugins/login-assets/lang/pt.json
@@ -74,6 +74,8 @@
     "SetPasswordNow": "Vou definir uma senha agora",
     "LoginAsGuest": "Continuar como convidado",
     "SignUpToCreateWorkspace": "Não há espaços de trabalho com acesso de convidado. Por favor, cadastre-se para criar o seu.",
-    "WhatIsYourName": "Qual é o seu nome?"
+    "WhatIsYourName": "Qual é o seu nome?",
+    "AccessExpired": "O tempo de acesso expirou. Por favor, solicite um novo link de acesso.",
+    "AccessNotActive": "O tempo de acesso ainda não começou. Começa em: "
   }
 }
diff --git a/plugins/login-assets/lang/ru.json b/plugins/login-assets/lang/ru.json
index 04eee1f76e..2e8d35f119 100644
--- a/plugins/login-assets/lang/ru.json
+++ b/plugins/login-assets/lang/ru.json
@@ -74,6 +74,8 @@
     "SetPasswordNow": "Я установлю пароль сейчас",
     "LoginAsGuest": "Продолжить как гость",
     "SignUpToCreateWorkspace": "Нет рабочих пространств с гостевым доступом. Пожалуйста, зарегистрируйтесь, чтобы создать своё.",
-    "WhatIsYourName": "Как вас зовут?"
+    "WhatIsYourName": "Как вас зовут?",
+    "AccessExpired": "Время доступа истекло. Пожалуйста, запросите новую ссылку доступа.",
+    "AccessNotActive": "Время доступа еще не началось. Начинается через: "
   }
 }
diff --git a/plugins/login-assets/lang/zh.json b/plugins/login-assets/lang/zh.json
index d61e64c1be..a24e0ec68e 100644
--- a/plugins/login-assets/lang/zh.json
+++ b/plugins/login-assets/lang/zh.json
@@ -74,6 +74,8 @@
     "SetPasswordNow": "现在设置密码",
     "LoginAsGuest": "以访客身份继续",
     "SignUpToCreateWorkspace": "没有支持访客访问的工作区。请注册以创建您自己的工作区。",
-    "WhatIsYourName": "您的姓名是什么？"
+    "WhatIsYourName": "您的姓名是什么？",
+    "AccessExpired": "访问时间已过期。请申请新的访问链接。",
+    "AccessNotActive": "访问时间尚未开始。开始时间："
   }
 }
diff --git a/plugins/login-resources/src/components/Auth.svelte b/plugins/login-resources/src/components/Auth.svelte
index f594ba0dae..2cf33b0773 100644
--- a/plugins/login-resources/src/components/Auth.svelte
+++ b/plugins/login-resources/src/components/Auth.svelte
@@ -1,10 +1,10 @@
 <script lang="ts">
   import { onMount } from 'svelte'
-  import { getCurrentLocation, Loading } from '@hcengineering/ui'
+  import { getCurrentLocation, Label, Loading, TimeLeft } from '@hcengineering/ui'
   import { logIn } from '@hcengineering/workbench'
   import { trackOAuthCompletion } from '@hcengineering/analytics-providers'
   import { type LoginInfoRequest, type LoginInfoByToken } from '@hcengineering/account-client'
-  import { OK, PlatformError, unknownError } from '@hcengineering/platform'
+  import platform, { OK, PlatformError, Status, unknownError } from '@hcengineering/platform'
 
   import type { Field } from '../types'
   import {
@@ -21,6 +21,7 @@
 
   let request: LoginInfoRequest | undefined
   let fields: Field[]
+  let status: Status = OK
   $: fields =
     request != null
       ? [
@@ -40,7 +41,19 @@
       return
     }
 
-    const result = await getLoginInfoFromQuery()
+    let result: LoginInfoByToken | null = null
+
+    try {
+      result = await getLoginInfoFromQuery()
+    } catch (err: any) {
+      if (
+        err instanceof PlatformError &&
+        [platform.status.TokenExpired, platform.status.TokenNotActive].includes(err.status.code)
+      ) {
+        status = err.status
+        return
+      }
+    }
 
     trackOAuthCompletion(result)
     await handleLoginInfo(result)
@@ -63,8 +76,6 @@
     }
   }
 
-  let status = OK
-
   const action = {
     i18n: login.string.Proceed,
     func: async () => {
@@ -80,10 +91,34 @@
       }
     }
   }
+
+  let timer: TimeLeft | undefined
 </script>
 
-{#if request != null}
+{#if status?.code === platform.status.TokenExpired}
+  <span class="text ml-8">
+    <Label label={login.string.AccessExpired} />
+  </span>
+{:else if status?.code === platform.status.TokenNotActive}
+  <span class="text ml-8">
+    <Label label={login.string.AccessNotActive} />
+    <TimeLeft
+      bind:this={timer}
+      time={status.params.notBefore * 1000}
+      showHours={true}
+      on:timeout={() => {
+        window.location.reload()
+      }}
+    />
+  </span>
+{:else if request != null}
   <Form caption={login.string.WhatIsYourName} {status} {fields} object={formData} {action} ignoreInitialValidation />
 {:else}
   <Loading />
 {/if}
+
+<style>
+  .text {
+    color: var(--theme-caption-color);
+  }
+</style>
diff --git a/plugins/login-resources/src/plugin.ts b/plugins/login-resources/src/plugin.ts
index 1fd878782b..a426680ed4 100644
--- a/plugins/login-resources/src/plugin.ts
+++ b/plugins/login-resources/src/plugin.ts
@@ -77,6 +77,8 @@ export default mergeIds(loginId, login, {
     SetPasswordLater: '' as IntlString,
     SetPasswordNow: '' as IntlString,
     SignUpToCreateWorkspace: '' as IntlString,
-    WhatIsYourName: '' as IntlString
+    WhatIsYourName: '' as IntlString,
+    AccessExpired: '' as IntlString,
+    AccessNotActive: '' as IntlString
   }
 })
diff --git a/server/account/src/__tests__/operations.test.ts b/server/account/src/__tests__/operations.test.ts
index 59f4e45506..f2ad8b85cc 100644
--- a/server/account/src/__tests__/operations.test.ts
+++ b/server/account/src/__tests__/operations.test.ts
@@ -25,7 +25,7 @@ import {
   systemAccountUuid
 } from '@hcengineering/core'
 import platform, { PlatformError, Status, Severity, getMetadata } from '@hcengineering/platform'
-import { decodeTokenVerbose } from '@hcengineering/server-token'
+import { decodeToken, decodeTokenVerbose } from '@hcengineering/server-token'
 
 import * as utils from '../utils'
 import { type AccountDB, type SocialId } from '../types'
@@ -66,13 +66,14 @@ jest.mock('@hcengineering/platform', () => {
 // Mock server-token
 jest.mock('@hcengineering/server-token', () => ({
   decodeTokenVerbose: jest.fn(),
-  generateToken: jest.fn().mockImplementation((account, workspace, extra, _, grant) => {
+  decodeToken: jest.fn(),
+  generateToken: jest.fn().mockImplementation((account, workspace, extra, _, options) => {
     let token = `mocked-token-${account}`
     if (workspace != null) {
       token += `-${workspace}`
     }
-    if (grant != null) {
-      token += `-${JSON.stringify(grant)}`
+    if (options != null) {
+      token += `-${JSON.stringify(options)}`
     }
     if (extra != null) {
       token += `-${JSON.stringify(extra)}`
@@ -113,7 +114,8 @@ describe('account operations', () => {
   const mockWorkspace = {
     uuid: 'workspace-uuid' as WorkspaceUuid,
     name: 'Test Workspace',
-    url: 'test-workspace'
+    url: 'test-workspace',
+    region: 'us'
   }
 
   beforeEach(() => {
@@ -529,7 +531,8 @@ describe('account operations', () => {
       },
       getWorkspaceRole: jest.fn(),
       assignWorkspace: jest.fn(),
-      updateWorkspaceRole: jest.fn()
+      updateWorkspaceRole: jest.fn(),
+      generatePersonUuid: jest.fn()
     } as unknown as AccountDB
 
     beforeEach(() => {
@@ -586,7 +589,7 @@ describe('account operations', () => {
           account: mockPersonId,
           name: 'John Doe',
           socialId: 'social-id-1',
-          token: 'mocked-token-test-person-id-workspace-uuid-{}',
+          token: 'mocked-token-test-person-id-workspace-uuid-{}-{}',
           workspace: mockWorkspaceEu.uuid,
           workspaceUrl: 'test-workspace',
           endpoint: 'ws://external:3000',
@@ -616,7 +619,7 @@ describe('account operations', () => {
           account: mockPersonId,
           name: 'John Doe',
           socialId: 'social-id-1',
-          token: 'mocked-token-test-person-id-workspace-uuid-{}',
+          token: 'mocked-token-test-person-id-workspace-uuid-{}-{}',
           workspace: mockWorkspaceUs.uuid,
           workspaceUrl: 'test-workspace',
           endpoint: 'ws://internal:3000',
@@ -633,7 +636,7 @@ describe('account operations', () => {
           account: mockPersonId,
           name: 'John Doe',
           socialId: 'social-id-1',
-          token: 'mocked-token-test-person-id-workspace-uuid-{}',
+          token: 'mocked-token-test-person-id-workspace-uuid-{}-{}',
           workspace: mockWorkspaceEu.uuid,
           workspaceUrl: 'test-workspace',
           endpoint: 'ws://external:3000',
@@ -663,7 +666,7 @@ describe('account operations', () => {
         account: mockPersonId,
         name: 'John Doe',
         socialId: 'social-id-1',
-        token: 'mocked-token-test-person-id-{}'
+        token: 'mocked-token-test-person-id-{}-{}'
       })
     })
 
@@ -692,6 +695,37 @@ describe('account operations', () => {
       )
     })
 
+    test('should use sub claim as account when provided', async () => {
+      const subAccount = 'sub-account-uuid' as AccountUuid
+      ;(decodeTokenVerbose as jest.Mock).mockReturnValue({
+        account: mockAccount.uuid,
+        workspace: mockWorkspace.uuid,
+        extra: {},
+        sub: subAccount
+      })
+      ;(mockDb.person.findOne as jest.Mock).mockResolvedValue({
+        uuid: subAccount,
+        firstName: 'Sub',
+        lastName: 'User'
+      })
+      ;(mockDb.socialId.find as jest.Mock).mockResolvedValue([{ _id: 'social-id-1' }])
+      ;(mockDb.getWorkspaceRole as jest.Mock).mockResolvedValue(AccountRole.User)
+      ;(mockDb.workspace.findOne as jest.Mock).mockResolvedValue(mockWorkspace)
+
+      const result = await getLoginInfoByToken(mockCtx, mockDb, mockBranding, mockToken)
+
+      expect(result).toEqual({
+        account: subAccount, // Should use sub instead of account
+        name: 'Sub User',
+        socialId: 'social-id-1',
+        token: expect.stringContaining(`"sub":"${subAccount}"`),
+        workspace: mockWorkspace.uuid,
+        workspaceUrl: mockWorkspace.url,
+        endpoint: expect.any(String),
+        role: AccountRole.User
+      })
+    })
+
     describe('with grants', () => {
       const grantWorkspace = {
         uuid: 'grant-workspace-uuid' as WorkspaceUuid,
@@ -800,12 +834,92 @@ describe('account operations', () => {
         expect(mockDb.assignWorkspace).not.toHaveBeenCalled()
       })
 
+      test('should generate UUID and use as sub when grant present without sub', async () => {
+        const generatedUuid = 'generated-uuid' as AccountUuid
+        const grant = {
+          workspace: mockWorkspace.uuid,
+          role: AccountRole.User,
+          firstName: 'John',
+          lastName: 'Doe'
+        }
+
+        ;(decodeTokenVerbose as jest.Mock).mockReturnValue({
+          account: utils.GUEST_ACCOUNT,
+          extra: {},
+          grant
+        })
+        ;(mockDb.account.findOne as jest.Mock).mockResolvedValue(null)
+        ;(mockDb.generatePersonUuid as jest.Mock).mockResolvedValue(generatedUuid)
+        ;(mockDb.person.findOne as jest.Mock).mockResolvedValue({
+          uuid: generatedUuid,
+          firstName: 'John',
+          lastName: 'Doe'
+        })
+        ;(mockDb.workspace.findOne as jest.Mock).mockResolvedValue(mockWorkspace)
+        ;(mockDb.getWorkspaceRole as jest.Mock).mockResolvedValue(AccountRole.User)
+
+        const result = await getLoginInfoByToken(mockCtx, mockDb, mockBranding, mockToken)
+
+        expect(mockDb.generatePersonUuid).toHaveBeenCalled()
+        expect(result).toEqual({
+          account: generatedUuid,
+          name: 'John Doe',
+          socialId: 'social-id-1',
+          token: expect.stringContaining(`"sub":"${generatedUuid}"`),
+          workspace: mockWorkspace.uuid,
+          workspaceUrl: mockWorkspace.url,
+          endpoint: expect.any(String),
+          role: AccountRole.User
+        })
+      })
+
+      test('should use existing sub', async () => {
+        const existingUuid = 'existing-uuid' as AccountUuid
+        const grant = {
+          workspace: mockWorkspace.uuid,
+          role: AccountRole.User,
+          firstName: 'John',
+          lastName: 'Doe'
+        }
+
+        ;(decodeTokenVerbose as jest.Mock).mockReturnValue({
+          account: utils.GUEST_ACCOUNT,
+          extra: {},
+          grant,
+          sub: existingUuid
+        })
+        ;(mockDb.account.findOne as jest.Mock).mockResolvedValue(null)
+        ;(mockDb.person.findOne as jest.Mock).mockResolvedValue({
+          uuid: existingUuid,
+          firstName: 'John',
+          lastName: 'Doe'
+        })
+        ;(mockDb.workspace.findOne as jest.Mock).mockResolvedValue(mockWorkspace)
+        ;(mockDb.getWorkspaceRole as jest.Mock).mockResolvedValue(AccountRole.User)
+
+        const result = await getLoginInfoByToken(mockCtx, mockDb, mockBranding, mockToken)
+
+        expect(mockDb.generatePersonUuid).not.toHaveBeenCalled()
+        expect(result).toEqual({
+          account: existingUuid,
+          name: 'John Doe',
+          socialId: 'social-id-1',
+          token: expect.stringContaining(`"sub":"${existingUuid}"`),
+          workspace: mockWorkspace.uuid,
+          workspaceUrl: mockWorkspace.url,
+          endpoint: expect.any(String),
+          role: AccountRole.User
+        })
+      })
+
       test('should throw error for grant with system account', async () => {
         ;(decodeTokenVerbose as jest.Mock).mockReturnValue({
-          account: systemAccountUuid,
+          account: utils.GUEST_ACCOUNT,
           extra: {},
-          grant: { workspace: grantWorkspace.uuid, role: grantRole }
+          grant: { workspace: grantWorkspace.uuid, role: grantRole },
+          sub: systemAccountUuid
         })
+        ;(mockDb.account.findOne as jest.Mock).mockResolvedValue(null)
 
         await expect(getLoginInfoByToken(mockCtx, mockDb, mockBranding, mockToken)).rejects.toThrow(
           new PlatformError(new Status(Severity.ERROR, platform.status.Forbidden, {}))
@@ -836,6 +950,63 @@ describe('account operations', () => {
         )
       })
     })
+
+    test('should handle token with nbf and exp claims', async () => {
+      const notBefore = Math.floor(Date.now() / 1000) - 3600 // 1 hour ago
+      const expiration = Math.floor(Date.now() / 1000) + 3600 // 1 hour from now
+
+      ;(decodeTokenVerbose as jest.Mock).mockReturnValue({
+        account: mockAccount.uuid,
+        workspace: mockWorkspace.uuid,
+        extra: {},
+        nbf: notBefore,
+        exp: expiration
+      })
+      ;(mockDb.person.findOne as jest.Mock).mockResolvedValue({
+        uuid: mockAccount.uuid,
+        firstName: 'John',
+        lastName: 'Doe'
+      })
+      ;(mockDb.socialId.find as jest.Mock).mockResolvedValue([{ _id: 'social-id-1' }])
+      ;(mockDb.getWorkspaceRole as jest.Mock).mockResolvedValue(AccountRole.User)
+      ;(mockDb.workspace.findOne as jest.Mock).mockResolvedValue(mockWorkspace)
+
+      const result = await getLoginInfoByToken(mockCtx, mockDb, mockBranding, mockToken)
+
+      expect(result).toEqual({
+        account: mockAccount.uuid,
+        name: 'John Doe',
+        socialId: 'social-id-1',
+        token: expect.stringContaining(`"nbf":${notBefore},"exp":${expiration}`),
+        workspace: mockWorkspace.uuid,
+        workspaceUrl: mockWorkspace.url,
+        endpoint: expect.any(String),
+        role: AccountRole.User
+      })
+    })
+
+    test('should throw error when token is not yet active', async () => {
+      const futureTime = Math.floor(Date.now() / 1000) + 3600 // 1 hour in the future
+
+      ;(decodeToken as jest.Mock).mockReturnValue({ nbf: futureTime })
+      ;(decodeTokenVerbose as jest.Mock).mockImplementation(() => {
+        throw new Error('Token not yet active')
+      })
+
+      await expect(getLoginInfoByToken(mockCtx, mockDb, mockBranding, mockToken)).rejects.toThrow(
+        new PlatformError(new Status(Severity.ERROR, platform.status.TokenNotActive, { notBefore: futureTime }))
+      )
+    })
+
+    test('should throw error when token has expired', async () => {
+      ;(decodeTokenVerbose as jest.Mock).mockImplementation(() => {
+        throw new Error('Token expired')
+      })
+
+      await expect(getLoginInfoByToken(mockCtx, mockDb, mockBranding, mockToken)).rejects.toThrow(
+        new PlatformError(new Status(Severity.ERROR, platform.status.TokenExpired, {}))
+      )
+    })
   })
 
   describe('releaseSocialId', () => {
@@ -956,10 +1127,13 @@ describe('account operations', () => {
 
       expect(mockDb.generatePersonUuid).toHaveBeenCalled()
       expect(result).toBe(
-        `${frontUrl}/login/auth?token=mocked-token-generated-person-uuid-${JSON.stringify({
-          workspace: 'workspace-uuid',
-          role: 'USER',
-          grantedBy: 'account-uuid'
+        `${frontUrl}/login/auth?token=mocked-token-b6996120-416f-49cd-841e-e4a5d2e49c9b-${JSON.stringify({
+          grant: {
+            workspace: 'workspace-uuid',
+            role: 'USER',
+            grantedBy: 'account-uuid'
+          },
+          sub: 'generated-person-uuid'
         })}`
       )
     })
@@ -977,12 +1151,15 @@ describe('account operations', () => {
 
       expect(mockDb.generatePersonUuid).toHaveBeenCalled()
       expect(result).toBe(
-        `${frontUrl}/login/auth?token=mocked-token-generated-person-uuid-${JSON.stringify({
-          workspace: mockWorkspace.uuid,
-          role: AccountRole.User,
-          grantedBy: 'account-uuid',
-          firstName: 'John',
-          lastName: 'Doe'
+        `${frontUrl}/login/auth?token=mocked-token-b6996120-416f-49cd-841e-e4a5d2e49c9b-${JSON.stringify({
+          grant: {
+            workspace: mockWorkspace.uuid,
+            role: AccountRole.User,
+            grantedBy: 'account-uuid',
+            firstName: 'John',
+            lastName: 'Doe'
+          },
+          sub: 'generated-person-uuid'
         })}`
       )
     })
@@ -1000,11 +1177,14 @@ describe('account operations', () => {
 
       expect(mockDb.generatePersonUuid).toHaveBeenCalled()
       expect(result).toBe(
-        `${frontUrl}/login/auth?token=mocked-token-generated-person-uuid-${JSON.stringify({
-          workspace: mockWorkspace.uuid,
-          role: AccountRole.User,
-          grantedBy: 'account-uuid',
-          extra: { param1: 'value1', param2: 'value2' }
+        `${frontUrl}/login/auth?token=mocked-token-b6996120-416f-49cd-841e-e4a5d2e49c9b-${JSON.stringify({
+          grant: {
+            workspace: mockWorkspace.uuid,
+            role: AccountRole.User,
+            grantedBy: 'account-uuid',
+            extra: { param1: 'value1', param2: 'value2' }
+          },
+          sub: 'generated-person-uuid'
         })}`
       )
     })
@@ -1022,10 +1202,13 @@ describe('account operations', () => {
 
       expect(mockDb.generatePersonUuid).toHaveBeenCalled()
       expect(result).toBe(
-        `${frontUrl}/login/auth?token=mocked-token-generated-person-uuid-${JSON.stringify({
-          workspace: 'workspace-uuid',
-          role: 'USER',
-          grantedBy: 'account-uuid'
+        `${frontUrl}/login/auth?token=mocked-token-b6996120-416f-49cd-841e-e4a5d2e49c9b-${JSON.stringify({
+          grant: {
+            workspace: 'workspace-uuid',
+            role: 'USER',
+            grantedBy: 'account-uuid'
+          },
+          sub: 'generated-person-uuid'
         })}&navigateUrl=${encodeURIComponent(navigateUrl)}`
       )
     })
@@ -1058,6 +1241,86 @@ describe('account operations', () => {
 
       expect(mockDb.generatePersonUuid).not.toHaveBeenCalled()
     })
+
+    test('should create non-personalized access link without UUID with notBefore and expiration', async () => {
+      const notBefore = 1703894400 // December 30, 2023 00:00:00 UTC in seconds
+      const expiration = 1704067200 // January 1, 2024 00:00:00 UTC in seconds
+      ;(mockDb.account.findOne as jest.Mock).mockResolvedValue(mockAccount)
+      ;(mockDb.workspace.findOne as jest.Mock).mockResolvedValue(mockWorkspace)
+      ;(mockDb.getWorkspaceRole as jest.Mock).mockResolvedValue(AccountRole.Maintainer)
+
+      const result = await createAccessLink(mockCtx, mockDb, mockBranding, mockToken, {
+        role: AccountRole.User,
+        personalized: false,
+        notBefore,
+        expiration
+      })
+
+      expect(result).toBe(
+        `${frontUrl}/login/auth?token=mocked-token-b6996120-416f-49cd-841e-e4a5d2e49c9b-${JSON.stringify({
+          grant: {
+            workspace: mockWorkspace.uuid,
+            role: AccountRole.User,
+            grantedBy: 'account-uuid'
+          },
+          exp: expiration,
+          nbf: notBefore
+        })}`
+      )
+      expect(mockDb.generatePersonUuid).not.toHaveBeenCalled()
+    })
+
+    test('should throw error when notBefore is in milliseconds', async () => {
+      ;(mockDb.account.findOne as jest.Mock).mockResolvedValue(mockAccount)
+      ;(mockDb.workspace.findOne as jest.Mock).mockResolvedValue(mockWorkspace)
+      ;(mockDb.getWorkspaceRole as jest.Mock).mockResolvedValue(AccountRole.Maintainer)
+
+      await expect(
+        createAccessLink(mockCtx, mockDb, mockBranding, mockToken, {
+          role: AccountRole.User,
+          notBefore: Date.now() // Milliseconds instead of seconds
+        })
+      ).rejects.toThrow(new PlatformError(new Status(Severity.ERROR, platform.status.BadRequest, {})))
+
+      expect(mockCtx.error).toHaveBeenCalledWith(
+        'Not before appears to be in milliseconds instead of seconds',
+        expect.any(Object)
+      )
+    })
+
+    test('should throw error when expiration is in milliseconds', async () => {
+      ;(mockDb.account.findOne as jest.Mock).mockResolvedValue(mockAccount)
+      ;(mockDb.workspace.findOne as jest.Mock).mockResolvedValue(mockWorkspace)
+      ;(mockDb.getWorkspaceRole as jest.Mock).mockResolvedValue(AccountRole.Maintainer)
+
+      await expect(
+        createAccessLink(mockCtx, mockDb, mockBranding, mockToken, {
+          role: AccountRole.User,
+          expiration: Date.now() // Milliseconds instead of seconds
+        })
+      ).rejects.toThrow(new PlatformError(new Status(Severity.ERROR, platform.status.BadRequest, {})))
+
+      expect(mockCtx.error).toHaveBeenCalledWith(
+        'Expiration appears to be in milliseconds instead of seconds',
+        expect.any(Object)
+      )
+    })
+
+    test('should throw error when expiration is before notBefore', async () => {
+      ;(mockDb.account.findOne as jest.Mock).mockResolvedValue(mockAccount)
+      ;(mockDb.workspace.findOne as jest.Mock).mockResolvedValue(mockWorkspace)
+      ;(mockDb.getWorkspaceRole as jest.Mock).mockResolvedValue(AccountRole.Maintainer)
+
+      await expect(
+        createAccessLink(mockCtx, mockDb, mockBranding, mockToken, {
+          role: AccountRole.User,
+          notBefore: 1000,
+          expiration: 900
+        })
+      ).rejects.toThrow(new PlatformError(new Status(Severity.ERROR, platform.status.BadRequest, {})))
+
+      expect(mockCtx.error).toHaveBeenCalledWith('Expiration time must be after Not Before time', expect.any(Object))
+    })
   })
 
   describe('authentication operations', () => {
diff --git a/server/account/src/operations.ts b/server/account/src/operations.ts
index d611d848a0..33fd4487d5 100644
--- a/server/account/src/operations.ts
+++ b/server/account/src/operations.ts
@@ -35,7 +35,7 @@ import {
   type WorkspaceUuid
 } from '@hcengineering/core'
 import platform, { getMetadata, PlatformError, Severity, Status, translate } from '@hcengineering/platform'
-import { decodeTokenVerbose, generateToken, type PermissionsGrant } from '@hcengineering/server-token'
+import { decodeToken, decodeTokenVerbose, generateToken, type PermissionsGrant } from '@hcengineering/server-token'
 
 import { isAdminEmail } from './admin'
 import { accountPlugin } from './plugin'
@@ -665,9 +665,13 @@ export async function createAccessLink (
     extra?: string
     navigateUrl?: string
     spaces?: string[]
+
+    notBefore?: number
+    expiration?: number
+    personalized?: boolean
   }
 ): Promise<string> {
-  const { role, firstName, lastName, navigateUrl, spaces } = params
+  const { role, firstName, lastName, navigateUrl, spaces, notBefore, expiration, personalized = true } = params
   const { account, workspace: workspaceUuid, extra } = decodeTokenVerbose(ctx, token)
 
   const currentAccount = await db.account.findOne({ uuid: account })
@@ -675,6 +679,10 @@ export async function createAccessLink (
     throw new PlatformError(new Status(Severity.ERROR, platform.status.AccountNotFound, { account }))
   }
 
+  if (workspaceUuid == null) {
+    throw new PlatformError(new Status(Severity.ERROR, platform.status.BadRequest, {}))
+  }
+
   const workspace = await db.workspace.findOne({ uuid: workspaceUuid })
   if (workspace == null) {
     throw new PlatformError(new Status(Severity.ERROR, platform.status.WorkspaceNotFound, { workspaceUuid }))
@@ -691,12 +699,30 @@ export async function createAccessLink (
     }
   }
 
+  const RECENT_PAST_MS = 1577836800000 // January 1, 2020 in milliseconds
+
+  if (notBefore !== undefined && notBefore > RECENT_PAST_MS) {
+    ctx.error('Not before appears to be in milliseconds instead of seconds', { nbf: notBefore })
+    throw new PlatformError(new Status(Severity.ERROR, platform.status.BadRequest, {}))
+  }
+
+  if (expiration !== undefined && expiration > RECENT_PAST_MS) {
+    ctx.error('Expiration appears to be in milliseconds instead of seconds', { exp: expiration })
+    throw new PlatformError(new Status(Severity.ERROR, platform.status.BadRequest, {}))
+  }
+
+  if (notBefore !== undefined && expiration !== undefined && expiration <= notBefore) {
+    ctx.error('Expiration time must be after Not Before time', { nbf: notBefore, exp: expiration })
+    throw new PlatformError(new Status(Severity.ERROR, platform.status.BadRequest, {}))
+  }
+
   const callerRole = await db.getWorkspaceRole(account, workspace.uuid)
   verifyAllowedRole(callerRole, AccountRole.User, extra)
   verifyAllowedRole(callerRole, role, extra)
 
-  const newUuid = await db.generatePersonUuid()
-  const accessToken = generateToken(newUuid, undefined, undefined, undefined, {
+  const newUuid = personalized ? await db.generatePersonUuid() : undefined
+
+  const grant = {
     workspace: workspaceUuid,
     role,
     grantedBy: account,
@@ -704,16 +730,28 @@ export async function createAccessLink (
     lastName,
     extra: extraObj,
     spaces
-  })
-  let path = `/login/auth?token=${accessToken}`
-  if (navigateUrl != null) {
-    path += `&navigateUrl=${encodeURIComponent(navigateUrl.trim())}`
   }
 
-  const front = getFrontUrl(branding)
-  const link = concatLink(front, path)
+  try {
+    const accessToken = generateToken(GUEST_ACCOUNT, undefined, undefined, undefined, {
+      grant,
+      sub: newUuid,
+      exp: expiration,
+      nbf: notBefore
+    })
+    let path = `/login/auth?token=${accessToken}`
+    if (navigateUrl != null) {
+      path += `&navigateUrl=${encodeURIComponent(navigateUrl.trim())}`
+    }
 
-  return link
+    const front = getFrontUrl(branding)
+    const link = concatLink(front, path)
+
+    return link
+  } catch (err: any) {
+    ctx.error('Failed to create access link', { err })
+    throw err
+  }
 }
 
 export async function createInviteLink (
@@ -1578,12 +1616,30 @@ export async function getLoginInfoByToken (
   let workspaceUuid: WorkspaceUuid
   let extra: any
   let grant: PermissionsGrant | undefined
+  let sub: AccountUuid | undefined
+  let account: AccountUuid | undefined
+  let nbf: number | undefined
+  let exp: number | undefined
+
   try {
-    ;({ account: accountUuid, workspace: workspaceUuid, extra, grant } = decodeTokenVerbose(ctx, token))
+    ;({ account, workspace: workspaceUuid, extra, grant, nbf, exp, sub } = decodeTokenVerbose(ctx, token))
+    if (grant != null && sub == null) {
+      sub = (await db.generatePersonUuid()) as AccountUuid
+    }
+    accountUuid = sub ?? account
   } catch (err: any) {
     Analytics.handleError(err)
-    ctx.error('Invalid token', { token })
-    throw new PlatformError(new Status(Severity.ERROR, platform.status.Unauthorized, {}))
+    ctx.error('Invalid token', { token, errMsg: err.message })
+    switch (err.message) {
+      case 'Token not yet active': {
+        const { nbf } = decodeToken(token, false)
+        throw new PlatformError(new Status(Severity.ERROR, platform.status.TokenNotActive, { notBefore: nbf }))
+      }
+      case 'Token expired':
+        throw new PlatformError(new Status(Severity.ERROR, platform.status.TokenExpired, {}))
+      default:
+        throw new PlatformError(new Status(Severity.ERROR, platform.status.Unauthorized, {}))
+    }
   }
 
   if (accountUuid == null) {
@@ -1595,7 +1651,6 @@ export async function getLoginInfoByToken (
   const isAdmin = extra?.admin === 'true'
 
   // Check if token has grants and create automatic account if needed
-  // NOTE: grants with open account UUID are not currently supported
   if (grant != null) {
     if (workspaceUuid != null) {
       ctx.error('Grants are not allowed in workspace-specific tokens', { workspaceUuid, grant })
@@ -1690,7 +1745,7 @@ export async function getLoginInfoByToken (
     account: accountUuid,
     name: getPersonName(person),
     socialId: socialId?._id,
-    token: generateToken(accountUuid, workspaceUuid, extra, undefined, grant)
+    token: generateToken(accountUuid, workspaceUuid, extra, undefined, { grant, nbf, exp, sub })
   }
 
   if (!isSystem) {
@@ -1853,7 +1908,8 @@ export async function getSocialIds (
   params: { confirmed: boolean, includeDeleted: boolean }
 ): Promise<SocialId[]> {
   const { confirmed = true, includeDeleted = false } = params
-  const { account } = decodeTokenVerbose(ctx, token)
+  const { account: accountUuid, sub } = decodeTokenVerbose(ctx, token)
+  const account = sub ?? accountUuid
 
   // do not expose not-confirmed social ids for now
   if (!confirmed) {
@@ -2180,7 +2236,7 @@ async function exchangeGuestToken (
       )
     }
 
-    return generateToken(GUEST_ACCOUNT as PersonUuid, workspace.uuid, { linkId, guest: 'true' })
+    return generateToken(GUEST_ACCOUNT, workspace.uuid, { linkId, guest: 'true' })
   }
 
   return token
diff --git a/server/account/src/utils.ts b/server/account/src/utils.ts
index d79535c09f..3aabdb76c9 100644
--- a/server/account/src/utils.ts
+++ b/server/account/src/utils.ts
@@ -67,7 +67,7 @@ import {
 } from './types'
 import { isAdminEmail } from './admin'
 
-export const GUEST_ACCOUNT = 'b6996120-416f-49cd-841e-e4a5d2e49c9b'
+export const GUEST_ACCOUNT = 'b6996120-416f-49cd-841e-e4a5d2e49c9b' as PersonUuid
 
 export async function getAccountDB (
   uri: string,
@@ -612,6 +612,9 @@ export async function selectWorkspace (
   let accountUuid: AccountUuid
   let extra: Record<string, any> | undefined
   let grant: PermissionsGrant | undefined
+  let sub: AccountUuid | undefined
+  let exp: number | undefined
+  let nbf: number | undefined
   try {
     const decodedToken = decodeTokenVerbose(ctx, token ?? '')
     accountUuid = decodedToken.account
@@ -620,6 +623,9 @@ export async function selectWorkspace (
     }
     extra = decodedToken.extra
     grant = decodedToken.grant
+    sub = decodedToken.sub
+    exp = decodedToken.exp
+    nbf = decodedToken.nbf
   } catch (e) {
     if (workspace?.allowReadOnlyGuest === true) {
       accountUuid = readOnlyGuestAccountUuid
@@ -668,7 +674,12 @@ export async function selectWorkspace (
   if (accountUuid === systemAccountUuid) {
     return {
       account: accountUuid,
-      token: generateToken(accountUuid, workspace.uuid, extra, undefined, grant),
+      token: generateToken(accountUuid, workspace.uuid, extra, undefined, {
+        grant,
+        sub,
+        exp,
+        nbf
+      }),
       endpoint: getEndpoint(workspace.uuid, workspace.region, getKind(workspace.region)),
       workspace: workspace.uuid,
       workspaceUrl: workspace.url,
@@ -725,7 +736,12 @@ export async function selectWorkspace (
 
   return {
     account: accountUuid,
-    token: generateToken(accountUuid, workspace.uuid, extra, undefined, grant),
+    token: generateToken(accountUuid, workspace.uuid, extra, undefined, {
+      grant,
+      sub,
+      exp,
+      nbf
+    }),
     endpoint: getEndpoint(workspace.uuid, workspace.region, getKind(workspace.region)),
     workspace: workspace.uuid,
     workspaceUrl: workspace.url,
diff --git a/server/token/src/token.ts b/server/token/src/token.ts
index 90df309e6c..7a6ae0eabf 100644
--- a/server/token/src/token.ts
+++ b/server/token/src/token.ts
@@ -12,6 +12,10 @@ export interface Token {
   workspace: WorkspaceUuid
   extra?: Record<string, any>
   grant?: PermissionsGrant
+
+  sub?: AccountUuid // Subject
+  exp?: number // Expiration, seconds since epoch
+  nbf?: number // Not valid before, seconds since epoch
 }
 
 // Permissions grant provides the token presenter access to a specific workspace
@@ -53,7 +57,12 @@ export function generateToken (
   workspaceUuid?: WorkspaceUuid,
   extra?: Record<string, string>,
   secret?: string,
-  grant?: PermissionsGrant
+  options?: {
+    grant?: PermissionsGrant
+    nbf?: number
+    exp?: number
+    sub?: PersonUuid
+  }
 ): string {
   if (!validate(accountUuid)) {
     throw new TokenError(`Invalid account uuid: "${accountUuid}"`)
@@ -61,10 +70,15 @@ export function generateToken (
   if (workspaceUuid !== undefined && !validate(workspaceUuid)) {
     throw new TokenError(`Invalid workspace uuid: "${workspaceUuid}"`)
   }
+  const { grant, nbf, exp, sub } = options ?? {}
   if (grant?.workspace !== undefined && !validate(grant?.workspace)) {
     throw new TokenError(`Invalid grant workspace uuid: "${grant?.workspace}"`)
   }
 
+  if (grant != null && sub == null && (nbf == null || exp == null)) {
+    throw new TokenError('nbf and exp are required when sub is not provided')
+  }
+
   const service = getMetadata(serverPlugin.metadata.Service)
   if (service !== undefined) {
     extra = { service, ...extra }
@@ -88,7 +102,10 @@ export function generateToken (
       ...(extra !== undefined ? { extra } : {}),
       account: accountUuid,
       workspace: workspaceUuid,
-      grant: sanitizedGrant
+      grant: sanitizedGrant,
+      sub,
+      exp,
+      nbf
     },
     secret ?? getSecret()
   )