Elevated errors affecting the Microsoft 365 connector

Incident Report for Claude

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.

Posted Nov 12, 2026 - 18:34 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.

Posted Nov 12, 2026 - 17:52 UTC

This incident affects: claude.ai and Claude Cowork.