Users may be unable to access or perform several actions in Microsoft 365 services

Update timeline

1. investigating Nov 13, 2026, 12:36 AM UTC

   User impact: Users may be unable to access or perform several actions in Microsoft 365 services. Current status: We're continuing to test the viability of recovery options. This issue impacts Outlook.com, OneDrive, OneNotem To Do, Teams, and Microsoft 365 for the web' although you may also see issues in other Microsoft 365 services could be affected. Next update by: Friday, November 13, 2026, at 4:30 AM UTC

2. investigating Nov 13, 2026, 04:13 AM UTC

   User impact: Users may be unable to access or perform several actions in Microsoft 365 services. Current status: We're continuing to test the viability of recovery options. This issue impacts Outlook.com, OneDrive, OneNote To Do, Teams, and Microsoft 365 for the web although you may also see issues in other Microsoft 365 services could be affected. Next update by: Friday, November 13, 2026, at 4:30 AM UTC

3. investigating Nov 13, 2026, 04:24 AM UTC

   User impact: Users may be unable to access or perform several actions in Microsoft 365 services. Current status: We're continuing to test the viability of recovery options. This issue impacts Outlook.com, OneDrive, OneNote, Microsoft To Do, Teams, and Microsoft 365 for the web although you may also see issues in other Microsoft 365 services could be affected. Next update by: Friday, November 13, 2026, at 4:30 AM UTC

4. investigating Nov 13, 2026, 04:24 AM UTC

   User impact: Users may be unable to access or perform several actions in Microsoft 365 services. Current status: We’re continuing our recovery efforts to restore service health throughout the affected environment. This issue impacts Outlook.com, OneDrive, OneNote, Microsoft To Do, Teams, and Microsoft 365 for the web although you may also see issues in other Microsoft 365 services. Next update by: Friday, November 13, 2026, at 6:30 AM UTC

5. investigating Nov 13, 2026, 06:24 AM UTC

   User impact: Users may be unable to access or perform several actions in Microsoft 365 services. Current status: We’re pursuing multiple workstreams to pinpoint the source of the issue and ensure the recovery of the affected environment. This issue impacts Outlook.com, OneDrive, OneNote, Microsoft To Do, Teams, and Microsoft 365 for the web although you may also see issues in other Microsoft 365 services. Next update by: Friday, November 13, 2026, at 8:30 AM UTC

6. investigating Nov 13, 2026, 11:21 AM UTC

   User impact: Users may be unable to access or perform several actions in Microsoft 365 services. Current status: We’re continuing to pursue multiple workstreams to pinpoint the source of the issue and ensure the recovery of the affected environment. This issue impacts Outlook.com, OneDrive, OneNote, Microsoft To Do, Teams, and Microsoft 365 for the web although you may also see issues in other Microsoft 365 services. Next update by: Friday, November 13, 2026, at 12:30 PM UTC

7. investigating Nov 13, 2026, 11:55 AM UTC

   User impact: Users may be unable to access or perform several actions in Microsoft 365 services. Current status: Our recovery efforts to restore service health throughout the affected environment is progressing. In parallel, we're continuing to pursue multiple workstreams to pinpoint the source of the issue and ensure the recovery of the affected environment. This issue impacts Outlook.com, OneDrive, OneNote, Microsoft To Do, Teams, and Microsoft 365 for the web although you may also see issues in other Microsoft 365 services. Next update by: Friday, November 13, 2026, at 2:30 PM UTC

8. investigating Nov 13, 2026, 02:10 PM UTC

   User impact: Users may be unable to access or perform several actions in Microsoft 365 services. Current status: Our recovery efforts to restore service health throughout the affected environment is ongoing and may take additional time to resolve. In parallel, we're continuing to pursue multiple workstreams to pinpoint the source of the issue. This issue impacts Outlook.com, OneDrive, OneNote, Microsoft To Do, Teams, and Microsoft 365 for the web although you may also see issues in other Microsoft 365 services. Next update by: Friday, November 13, 2026, at 4:30 PM UTC

9. investigating Nov 13, 2026, 04:24 PM UTC

   User impact: Users may be unable to access or perform several actions in Microsoft 365 services. Current status: We're observing signs of sustained recovery throughout the affected environment, and while our investigation into the underlying root cause is ongoing, we're continuing to monitor the impacted services to verify service health levels remain stable. This issue impacts Outlook.com, OneDrive, OneNote, Microsoft To Do, Teams, and Microsoft 365 for the web although you may also see issues in other Microsoft 365 services. Next update by: Friday, November 13, 2026, at 6:30 PM UTC

10. investigating Nov 13, 2026, 06:57 PM UTC

    User impact: Users may be unable to access or perform several actions in Microsoft 365 services. Current status: We are deeply sorry for the disruption this incident has caused you and your business. We know the trust you place in our services and take that responsibility extremely seriously. We are seeing broad recovery and stability across our services. This was a technical issue not related to cyber or AI / agents. The incident was introduced by an issue during an earlier network capacity upgrade that surfaced following a recent network change. We have addressed the underlying issue and continue to restore service to remaining customers and regions. Given the scale of demand, we restored services gradually, validating stability at each stage. While this took longer, it helped ensure a stable restoration. We will provide a full post-incident report once our review is complete. Next update by: Friday, November 13, 2026, at 9:00 PM UTC

11. investigating Nov 13, 2026, 08:03 PM UTC

    User impact: Users may be unable to access or perform several actions in Microsoft 365 services. Current status: As infrastructure stabilizes, we're still draining queued messages and rebalancing traffic, so customers may see improved sign-in/access while delivery and processing continue to catch up. We do not have an ETA for full recovery yet. Service access can recover before mail flow fully normalizes. Next update by: Saturday, November 14, 2026, at 12:00 AM UTC

12. investigating Nov 14, 2026, 12:39 AM UTC

    User impact: Users may be unable to access or perform several actions in Microsoft 365 services. Current status: We're observing sustained recovery of impacted services across the previously affected environments. We're monitoring service health metrics for an extended period to ensure no further actions are required to totally remediate the issue. In parallel, we're monitoring the backlog of email messages which accumulated during the impact period to verify all are processed before this issue is considered remediated. Next update by: Saturday, November 14, 2026, at 2:00 AM UTC

13. investigating Nov 14, 2026, 03:18 AM UTC

    User impact: Users may be unable to access or perform several actions in Microsoft 365 services. Current status: We're continuing to observe sustained recovery of impacted services across the previously affected environments. We're also continuing to monitor service health metrics to ensure no further actions are required to fully remediate the issue along with monitoring the aforementioned backlog of email to verify all are processed before this issue is considered remediated. Next update by: Saturday, November 14, 2026, at 4:00 AM UTC

14. resolved Nov 14, 2026, 03:51 AM UTC

    User impact: Users may have been unable to access or perform several actions in Microsoft 365 services. Final status: We've confirmed that the services across the previously affected environments have fully recovered and the backlog of email messages has been processed, thus this issue is remediated. Start time: Thursday, November 12, 2026, at 10:05 AM UTC End time: Friday, November 13, 2026, at 4:10 PM UTC This is the final update for the event.