check before: 2025-06-15
Product:
Exchange, Outlook, Windows
Platform:
Online, Web, Windows Desktop, World tenant
Status:
Rolling out
Change type:
Admin impact, New feature, Updated message
Links:
Details:
Summary:
Offline support in the new Outlook for Windows will allow users to create, edit, and delete single calendar events without internet. Rollout starts late September 2025, completing by February 2026. Recurring events offline are not supported. Controlled by the Owamailboxpolicy -OfflineEnabledWin setting.
Details:
Updated January 23, 2026: We have updated the timeline. Thank you for your patience.
We're expanding offline capabilities in the new Outlook for Windows. Users will soon be able to create, edit, and delete single calendar events even when not connected to the internet. This enhancement improves productivity and flexibility when working offline.
This change is associated with Microsoft 365 Roadmap ID: 490059
[When this will happen:]
Targeted Release: Rollout will begin in late September 2025 and is expected to complete by late October 2025.
General Availability (Worldwide): Rollout will begin in late October 2025 (previously mid-September) and is expected to complete by early February 2026 (previously mid-December 2025).
Change Category:
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Scope:
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Release Phase:
General Availability, Targeted Release
Created:
2025-06-24
updated:
2026-01-24
Task Type
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Docu to Check
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MS How does it affect me
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MS Preperations
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MS Urgency
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MS workload name
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linked item details
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summary for non-techies**
The new update to Outlook for Windows allows users to create, edit, and delete calendar events offline, except for recurring events, which still require an internet connection, and this offline capability is controlled by an organization's IT policy.
Direct effects for Operations**
Offline Calendar Functionality
Users may experience confusion or frustration if they attempt to create or edit recurring events offline, as this functionality is not supported. This could lead to mismanagement of schedules and missed appointments.
- roles: End Users, Administrative Staff
- references: https://support.microsoft.com/en-us/office/work-offline-in-outlook-2460e4a8-16c7-47fc-b204-b1549275aac9#picktab=new_outlook, https://www.microsoft.com/en-us/microsoft-365/roadmap?rtc=1%26filters%3D&searchterms=490059
Policy Management
If the OwaMailboxPolicy is not properly configured to enable offline functionality, users will be unable to utilize the new features, leading to decreased productivity and potential user dissatisfaction.
- roles: IT Administrators, End Users
- references: https://learn.microsoft.com/powershell/module/exchange/set-owamailboxpolicy, https://www.microsoft.com/en-us/microsoft-365/roadmap?rtc=1%26filters%3D&searchterms=490059
Data Accessibility
The ability to access and edit calendar data offline may lead to data synchronization issues when users reconnect to the internet, potentially causing conflicts or loss of data integrity.
- roles: End Users, IT Support Staff
- references: https://support.microsoft.com/en-us/office/work-offline-in-outlook-2460e4a8-16c7-47fc-b204-b1549275aac9#picktab=new_outlook, https://www.microsoft.com/en-us/microsoft-365/roadmap?rtc=1%26filters%3D&searchterms=490059
Configutation Options**
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Opportunities**
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Potentional Risks**
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Data Protection**
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IT Security**
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Hypothetical Work Council Statement**
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DPIA Draft**
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explanation for non-techies**
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** AI generated content. This information must be reviewed before use.
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change history
| Date | Property | old | new |
| 2026-01-24 | MC Last Updated | 09/04/2025 21:18:30 | 2026-01-23T21:34:32Z |
| 2026-01-24 | MC Messages | Updated September 4, 2025: We have updated the timeline. Thank you for your patience.
We're expanding offline capabilities in the new Outlook for Windows. Users will soon be able to create, edit, and delete single calendar events even when not connected to the internet. This enhancement improves productivity and flexibility when working offline. This change is associated with Microsoft 365 Roadmap ID: 490059 [When this will happen:] Targeted Release: Rollout will begin in late September 2025 and is expected to complete by late October 2025. General Availability (Worldwide): Rollout will begin in late October 2025 (previously mid-September) and is expected to complete by mid-December 2025 (previously mid-October). | Updated January 23, 2026: We have updated the timeline. Thank you for your patience.
We're expanding offline capabilities in the new Outlook for Windows. Users will soon be able to create, edit, and delete single calendar events even when not connected to the internet. This enhancement improves productivity and flexibility when working offline. This change is associated with Microsoft 365 Roadmap ID: 490059 [When this will happen:] Targeted Release: Rollout will begin in late September 2025 and is expected to complete by late October 2025. General Availability (Worldwide): Rollout will begin in late October 2025 (previously mid-September) and is expected to complete by early February 2026 (previously mid-December 2025). |
| 2026-01-24 | MC End Time | 01/26/2026 08:00:00 | 2026-03-09T08:00:00Z |
| 2026-01-24 | MC Summary | Offline support in the new Outlook for Windows will allow users to create, edit, and delete single calendar events without internet. Rollout begins late September 2025, completing by mid-December. Recurring events offline are not supported. Controlled by the OWA mailbox policy setting OfflineEnabledWin. | Offline support in the new Outlook for Windows will allow users to create, edit, and delete single calendar events without internet. Rollout starts late September 2025, completing by February 2026. Recurring events offline are not supported. Controlled by the Owamailboxpolicy -OfflineEnabledWin setting. |
| 2025-09-05 | MC Last Updated | 07/16/2025 16:46:35 | 2025-09-04T21:18:30Z |
| 2025-09-05 | MC Messages | Updated July 16, 2025: We have updated the timeline. Thank you for your patience.
We're expanding offline capabilities in the new Outlook for Windows. Users will soon be able to create, edit, and delete single calendar events even when not connected to the internet. This enhancement improves productivity and flexibility when working offline. This change is associated with Microsoft 365 Roadmap ID: 490059 [When this will happen:] General Availability (Worldwide): Rollout will begin in mid-August 2025 and is expected to complete by mid-September 2025. | Updated September 4, 2025: We have updated the timeline. Thank you for your patience.
We're expanding offline capabilities in the new Outlook for Windows. Users will soon be able to create, edit, and delete single calendar events even when not connected to the internet. This enhancement improves productivity and flexibility when working offline. This change is associated with Microsoft 365 Roadmap ID: 490059 [When this will happen:] Targeted Release: Rollout will begin in late September 2025 and is expected to complete by late October 2025. General Availability (Worldwide): Rollout will begin in late October 2025 (previously mid-September) and is expected to complete by mid-December 2025 (previously mid-October). |
| 2025-09-05 | MC End Time | 10/20/2025 09:00:00 | 2026-01-26T08:00:00Z |
| 2025-09-05 | MC Summary | Offline support for creating, editing, and deleting single calendar events in the new Outlook for Windows will be available from mid-August to mid-September 2025. This feature requires the OWAMailboxPolicy -OfflineEnabledWin to be set to True. Recurring events are not supported offline. Admins can manage settings via Set-OwaMailboxPolicy cmdlet. | Offline support in the new Outlook for Windows will allow users to create, edit, and delete single calendar events without internet. Rollout begins late September 2025, completing by mid-December. Recurring events offline are not supported. Controlled by the OWA mailbox policy setting OfflineEnabledWin. |
| 2025-07-17 | MC MessageTagNames | New feature, Admin impact | Updated message, New feature, Admin impact |
| 2025-07-17 | MC Summary | Offline support for creating, editing, and deleting single calendar events in the new Outlook for Windows will be available from mid-June to mid-July 2025. This feature requires the `OWAMailboxPolicy -OfflineEnabledWin` setting to be true. Recurring events are not supported offline. Admins can manage settings using the Set-OwaMailboxPolicy cmdlet. | Offline support for creating, editing, and deleting single calendar events in the new Outlook for Windows will be available from mid-August to mid-September 2025. This feature requires the OWAMailboxPolicy -OfflineEnabledWin to be set to True. Recurring events are not supported offline. Admins can manage settings via Set-OwaMailboxPolicy cmdlet. |
| 2025-07-17 | MC Last Updated | 06/24/2025 02:00:39 | 2025-07-16T16:46:35Z |
| 2025-07-17 | MC Messages | We're expanding offline capabilities in the new Outlook for Windows. Users will soon be able to create, edit, and delete single calendar events even when not connected to the internet. This enhancement improves productivity and flexibility when working offline.
This change is associated with Microsoft 365 Roadmap ID: 490059 [When this will happen:] General Availability (Worldwide): Rollout will begin in mid-June 2025 and is expected to complete by mid-July 2025. | Updated July 16, 2025: We have updated the timeline. Thank you for your patience.
We're expanding offline capabilities in the new Outlook for Windows. Users will soon be able to create, edit, and delete single calendar events even when not connected to the internet. This enhancement improves productivity and flexibility when working offline. This change is associated with Microsoft 365 Roadmap ID: 490059 [When this will happen:] General Availability (Worldwide): Rollout will begin in mid-August 2025 and is expected to complete by mid-September 2025. |
| 2025-07-17 | MC Title | Offline Support for Calendar - Create, Edit and Delete Event support | (Updated) Offline Support for Calendar - Create, Edit and Delete Event support |
| 2025-07-17 | MC End Time | 09/22/2025 09:00:00 | 2025-10-20T09:00:00Z |
Last updated 4 weeks ago ago
