Claude status page shows two outages: authentication issue and Microsoft 365 connector error
Anthropic-owned Claude’s official status page updated on November 13, 2026 to show a large number of errors on claude.ai, Claude Code, and platform.claude.com. The company said it is investigating authentication issues users are encountering when logging in to Claude.ai and Claude Code, and will provide updates as soon as possible. The update was posted at 09:58 UTC on November 13, 2026.
The same status page is also continuing to update another incident: a severe error affecting the Microsoft 365 connector. The company said the issue was caused by a Microsoft 365 service outage, and that the mail, calendar, and search tools in the connector are still unable to handle most requests; Claude for Outlook is also affected. Users can visit Microsoft’s official status page to view progress, and this post will be updated after service is restored. The first update related to this issue was posted at 17:52 UTC on November 12, 2026, and the most recent update was at 22:23 UTC that same day.
The status page currently lists claude.ai as a major outage, Claude Code and platform.claude.com as a partial outage, and Claude Cowork as experiencing degraded performance. The Microsoft 365 connector issue is separately listed as an unresolved incident, and the company had previously confirmed that it is continuing to work with the upstream provider (Microsoft) on the matter.
Original sources:
Title: Claude Status - Elevated errors on claude.ai, Claude Code, and platform.claude.com and related Microsoft 365 connector incident
Publisher: Anthropic (Claude Status official status page)
Publication date: November 13, 2026 / November 12, 2026
URL: status.claude.com
Source type: Official status page
Verification status: The status page content was read directly, confirming the two separate incidents and the specific update times and wording
Supporting content: Authentication investigation statement and the Microsoft 365 connector outage attribution and scope of impact
ABAB AI Insight
The Claude status page records two separate incidents at the same time. One is an authentication issue newly added on November 13, 2026, affecting logins to claude.ai and Claude Code; the other is a Microsoft 365 connector error continuing since November 12, 2026, which the company clearly attributed to a Microsoft 365 service outage and pointed to Microsoft’s official status page.
The Microsoft 365 connector incident has been updated multiple times since 17:52 UTC on November 12. The company confirmed that mail, calendar, search tools, and Claude for Outlook are affected, and that it is continuing to communicate with the upstream provider. The timing of this incident overlaps with the previously reported global Microsoft 365 service outage, but Claude officially only attributes the connector issue to Microsoft and does not directly link the authentication issue to it.
The two outages affect users in different ways. The authentication issue affects login and core access; the connector issue is limited to functions that rely on Microsoft 365 integration (mail, calendar, Teams, SharePoint, etc.). The status page currently marks claude.ai as a major outage, while the other related products are marked as partial outage or degraded performance.
The company is still investigating or actively handling both incidents and has not published a restoration timeline. Users can track updates via the official status page, and progress related to Microsoft 365 can also be checked on Microsoft’s status page.
ABAB News · Law of Cognition
The official status page records authentication issues and upstream connector outages separately, with clear attribution boundaries.
Upstream service outages can cause integrated functions to keep failing, but core login problems need to be investigated separately.
When multiple products are simultaneously marked as down, the impact scope of the login path and the third-party connector path must be distinguished.