Elevated errors affecting the Microsoft 365 connector
View the provider incident record →Current answer
Anthropic (Claude) experienced a major incident: Elevated errors affecting the Microsoft 365 connector. ServiceAlert observed recovery on Nov 14, 2026.
Official Anthropic (Claude) status page Current Anthropic (Claude) status
ServiceAlert observed status change:
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Incident Lifecycle
Affected Components
claude.ai
Claude Cowork
Incident Timeline
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.
Nov 13, 2026 at 3:40 PM UTC
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.
Nov 12, 2026 at 10:23 PM UTC
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.
Nov 12, 2026 at 9:18 PM UTC
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.
Nov 12, 2026 at 8:28 PM UTC
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.
Nov 12, 2026 at 6:34 PM UTC
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.
Nov 12, 2026 at 5:52 PM UTC
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