Anthropic is investigating elevated errors and slow responses affecting its Microsoft 365 connector, according to an official advisory published on 12 November at 17:52 UTC.reported The company stated that requests to mail, SharePoint, Teams chat and calendar through the connector may fail, and new connections to the connector may not complete.Anthropic is looking into problems that are making its Microsoft 365 connector slow or unable to connect to email and other services.Anthropic’s status page indicates an investigation into elevated error rates and latency within the Microsoft 365 connector integration layer. Anthropic said it will provide an update as soon as possible.
The figures
- 12 November: Date of the investigation announcement.
- 17:52 UTC: Time of the investigation announcement.reported
Behind the figures
Anthropic’s status page reported the investigation at 17:52 UTC on 12 November.reported The company noted that it is investigating elevated errors and slow responses affecting the Microsoft 365 connector.reported
What it means for your stack
Developers relying on the Microsoft 365 connector for mail, SharePoint, Teams chat or calendar access may experience failed requests.reported New connections to the connector may also fail to complete, potentially disrupting workflows that depend on real-time data retrieval from these Microsoft services.
Building on this
Inference engineers should monitor Anthropic’s status page for updates regarding the Microsoft 365 connector.reported The documented capabilities of the connector include access to mail, SharePoint, Teams chat and calendar. The current limits include elevated errors, slow responses, failed requests and incomplete new connections. Developers can build fallback mechanisms or retry logic to handle these failures while the investigation is ongoing.
Why it matters
- Developers using the Microsoft 365 connector may experience failed requests for mail, SharePoint, Teams chat and calendar data.
- New connections to the connector may not complete, potentially blocking initialization of dependent workflows.
- The investigation status indicates that the root cause and resolution timeline are not yet confirmed.
- Monitoring the official status page is necessary for updates on when normal operations resume.
Topics: Anthropic, Microsoft 365, connector, errors, status
Updated
Then / now / next
The Microsoft 365 connector was operating without reported elevated errors.
Anthropic is investigating elevated errors and slow responses affecting the connector.
Anthropic will provide an update as soon as possible regarding the resolution.
Story timeline
- Then The Microsoft 365 connector was operating without reported elevated errors.
- 12 Nov 2026 Elevated errors affecting the Microsoft 365 connector
- 12 Nov 2026 Elevated errors affecting the Microsoft 365 connector
- Now Anthropic is investigating elevated errors and slow responses affecting the connector.
- Next Anthropic will provide an update as soon as possible regarding the resolution.
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Your choice stays on this device. No public tally.Terms in this story
Microsoft 365 connector
A tool that allows Anthropic’s services to access Microsoft 365 data.
Elevated errors
An increase in the number of error responses from a service.
SharePoint
A Microsoft service for document management and collaboration.
Teams chat
A messaging feature within the Microsoft Teams platform.
Questions readers ask
What services are affected by the Microsoft 365 connector errors?
Mail, SharePoint, Teams chat and calendar requests through the connector may fail.
When did Anthropic start investigating the errors?
Anthropic began investigating on 12 November at 17:52 UTC.
Will new connections to the connector work?
New connections to the connector may not complete during the investigation.
Connected stories
Reading receipt
- Anthropic reported investigating elevated errors and slow responses affecting the Microsoft 365 connector on 12 November at 17:52 UTC.
- Requests to mail, SharePoint, Teams chat and calendar through the connector may fail during this period.
- New connections to the connector may not complete, and Anthropic stated it will provide an update as soon as possible.
Still open: What is the root cause of the elevated errors and slow responses?
Still open: When will normal operations for the Microsoft 365 connector resume?