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Anthropic Issues Multiple Outage Notices as Microsoft Service Disruption Affects Claude

Source: IT之家 Published: AI 中文 ClaudeAnthropic 6 more articles on this event →
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IT之家, November 13: Microsoft 365 suffered one of its most serious service outages in recent years, with Exchange Online, Outlook, SharePoint and some Teams services down for nearly a day and a half; a Microsoft executive apologized for the incident and largely acknowledged that it could not be resolved quickly. Anthropic attributed failures in some of its own services to Microsoft 365 connectivity and posted a series of notices on its Claude Status page, saying the problem originated with an upstream service provider, that most mail, calendar and search requests through the Microsoft 365 connector could not be processed, and that Claude for Outlook was also affected. Anthropic also confirmed abnormally high error rates on claude.ai, Claude Code and platform.claude.com, where users were unable to complete authentication.

Translation(model translation, not the source's own text)

Anthropic Issues Multiple Incident Reports: Microsoft Service Outage Affects Claude

IT之家 November 13 news: Microsoft 365 has suffered one of its most severe service outages in recent years, with Exchange Online, Outlook, SharePoint, and some Teams services disrupted for nearly a day and a half. Earlier today, a Microsoft executive apologized for the outage and expressed regret over the situation, essentially acknowledging that the problem could not be resolved in a short time.

Anthropic attributed the failure of some of its own services to Microsoft 365 connectivity, and successively published the following updates via the Claude Status page:

  • Investigating: We are investigating elevated error rates and slow responses with the Microsoft 365 connector. Users may encounter failed requests when accessing mail, SharePoint, Teams chats, and calendars through the connector, and new users may be unable to complete the connection. We will provide updates on the investigation as soon as possible.
  • Identified: The issue originates with an upstream service provider, affecting the Microsoft 365 connector. Most requests for mail, calendar, and search functionality cannot be processed normally, and new connections may also fail. We are in communication with the service provider and will provide updates as soon as possible.
  • Update: We are still working with the upstream service provider to address the outage. Most requests for mail, calendar, and search functionality in the Microsoft 365 connector still cannot be processed normally. Claude for Outlook is also affected; users may be unable to perform mail and calendar operations, and some users may even be unable to open the add-in. We will provide another update within an hour.
  • Update: The outage stems from an abnormality in the Microsoft 365 service. The connector's mail, calendar, and search functionality still cannot process most requests normally, and Claude for Outlook has not yet recovered.

However, Claude encountered a new service outage. According to an earlier report by IT之家 today, Anthropic confirmed that claude.ai, Claude Code, and platform.claude.com all experienced abnormally elevated error rates, and users were unable to complete authentication on these platforms.

  • "Claude Experiences Numerous Errors, Anthropic Official Announcement Says Investigation Underway"

The translation is machine-generated and individual terms may be off. Nothing is rewritten or cut; the original is authoritative.

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