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Claude outage on 12 November 2026

Timeline

1. 12 Nov 2026, 17:54 UTC
   We started seeing problems. Our verdict: Some users report problems.
2. 12 Nov 2026, 17:54 UTC · official update
   Elevated errors affecting the Microsoft 365 connector (investigating): “We are investigating elevated errors and slow responses affecting the Microsoft 365 connector. Requests to mail, SharePoint, Teams chat and calendar through the connector may fail, and new connections to the connector may not complete. We will provide an update as soon as possible.” Source
3. 12 Nov 2026, 18:35 UTC · official update
   Elevated errors affecting the Microsoft 365 connector (identified): “We have identified an issue with an upstream provider affecting the Microsoft 365 connector. Mail, calendar and search tools are failing for most requests, and new connections to the connector may not complete. We are in contact with them and will provide an update as soon as possible.” Source
4. 12 Nov 2026, 20:29 UTC · official update
   Elevated errors affecting the Microsoft 365 connector (identified): “We are continuing to work with our upstream provider on this issue. Mail, calendar and search tools in the Microsoft 365 connector are still failing for most requests. Claude for Outlook is also affected: mail and calendar actions may fail, and some users may not be able to open the add-in. We will provide another update within the hour.” Source
5. 12 Nov 2026, 21:19 UTC · official update
   Elevated errors affecting the Microsoft 365 connector (identified): “We are continuing to work with our upstream provider, who is restarting affected servers. Mail, calendar and search tools in the Microsoft 365 connector are still failing for most requests, and Claude for Outlook remains affected. We will provide another update as soon as we have more information.” Source
6. 12 Nov 2026, 22:24 UTC · official update
   Elevated errors affecting the Microsoft 365 connector (identified): “This issue is caused by a Microsoft 365 service incident, and mail, calendar and search tools in the Microsoft 365 connector are still failing for most requests. Claude for Outlook remains affected. You can follow Microsoft's progress at https://status.cloud.microsoft. We will update this post when service is restored.” Source
7. 12 Nov 2026, 23:55 UTC · official update
   Elevated errors affecting the Microsoft 365 connector (identified): “This issue is caused by a Microsoft 365 service incident, and mail, calendar and search tools in the Microsoft 365 connector are still failing for most requests. Claude for Outlook remains affected. You can follow Microsoft's progress at https://status.cloud.microsoft. We will update this post when service is restored.” Source
8. 13 Nov 2026, 10:00 UTC
   Our verdict changed to: Likely down.
9. 13 Nov 2026, 10:00 UTC · official update
   Elevated errors on claude.ai, Claude Code, and platform.claude.com (investigating): “We are investigating an issue with users authenticating to Claude.ai and Claude Code. We will provide an update as soon as possible.” Source
10. 13 Nov 2026, 11:06 UTC · official update
    Elevated errors on claude.ai, Claude Code, and platform.claude.com (monitoring): “A fix has been deployed for the issue affecting Claude services and we are monitoring for recovery.” Source
11. 13 Nov 2026, 13:10 UTC · official update
    Elevated errors on claude.ai, the Claude API, and Claude Code (investigating): “We are investigating reports of degraded performance affecting claude.ai, the Claude API, and Claude Code. We will provide an update as soon as possible.” Source
12. 13 Nov 2026, 13:52 UTC · official update
    Elevated errors on claude.ai, the Claude API, and Claude Code (investigating): “We are investigating reports of degraded performance affecting claude.ai, the Claude API, Claude Code, and connectors (including Claude Docs and Claude Sheets).” Source
13. 13 Nov 2026, 14:04 UTC · official update
    Elevated errors on claude.ai, the Claude API, and Claude Code (investigating): “We are investigating reports of degraded performance affecting a variety of surfaces including claude.ai, the Claude API, Claude Code, connectors (including Claude Docs and Claude Sheets), Claude Security and Claude Managed Agents.” Source
14. 13 Nov 2026, 14:37 UTC
    Our verdict changed to: Some users report problems.
15. 13 Nov 2026, 14:37 UTC · official update
    Elevated errors on claude.ai, the Claude API, and Claude Code (investigating): “We're seeing recovery on claude.ai and the Claude API, though errors may return while we continue working on this. Connectors, including Docs and Sheets, remain degraded, as do Claude in Meetings, Claude Managed Agents, Claude Security and connector use in Claude Code. Mobile apps are affected in the same way as claude.ai. We'll share another update soon.” Source
16. 13 Nov 2026, 15:34 UTC · official update
    Elevated errors on claude.ai, the Claude API, and Claude Code (monitoring): “Errors on claude.ai, including the mobile apps, the Claude API and Claude Code have returned to normal levels, and we are continuing to monitor. Existing connectors, including Docs and Sheets, are working again, and Claude Managed Agents and Claude Meetings are recovering. Adding a new connector on claude.ai is temporarily unavailable. Scheduled tasks and routines can run more than two hours late…” Source
17. 13 Nov 2026, 15:42 UTC · official update
    Elevated errors affecting the Microsoft 365 connector (monitoring): “We're seeing signs of recovery for the Microsoft 365 connector. Claude for Outlook is also recovering. Some SharePoint search requests are still returning errors. Microsoft's incident remains open, so errors may return. We're continuing to monitor and will update this post as soon as we have more info.” Source
18. 13 Nov 2026, 21:50 UTC
    Looking normal again. We'll keep watching for 15 minutes before closing this.
19. 13 Nov 2026, 22:04 UTC
    Everything has looked normal for 15 minutes, so we marked this incident as resolved.

Times are shown in your local time zone. “Official update” entries quote Anthropic's status page; follow the source link for the full text.

How we track incidents

We open an incident when Claude stops looking normal or Anthropic posts an official incident, and close it after 15 minutes with everything back to normal. More about our method.