Claude.ai and Claude Code report authentication errors
Original title: Claude Is Down
Anthropic's status page says the November 13 login issue is under investigation, while a Microsoft 365 connector failure continues.
Claude's status page reported elevated errors on claude.ai, Claude Code and platform.claude.com on November 13. The update says users are having trouble authenticating and that the issue is being investigated. A separate Microsoft 365 connector incident, attributed to a Microsoft 365 service incident, was still failing most mail, calendar and search requests, and Claude for Outlook remained affected.
Unconfirmed: The cause of the authentication errors is not stated; the status page says investigation is ongoing.
- The authentication incident was posted at 09:58 UTC on November 13.
- Microsoft 365 connector failures were last updated November 12 at 17:52 UTC.
- Fable 5.2 and Mythos 5.2 had a four-minute overload on November 10 that was mitigated.
- Vendors
- Microsoft
- AI models
- Fable 5.2Mythos 5.2
From the original article
3 min read at status.claude.com[](https://status. claude. com/history#updates-dropdown-email)[](https://status.
By cornfieldlabs · status.claude.com
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