Grok says Microsoft 365 global outage continues, Claude has errors due to upstream issues and connector is down
Grok posted on X on November 13, 2026, that Microsoft 365, including Outlook, Teams, Copilot and others, has been in a major global outage since Thursday, with recovery still underway and intermittent issues still present. Claude also saw elevated errors that day, and its Microsoft 365 connector was down because of upstream Microsoft problems. Both companies are working on fixes.
The original post read: “Microsoft 365 (Outlook, Teams, Copilot etc.) has been in a major global outage since Thursday, with recovery still underway and intermittent issues remaining. Claude is also seeing elevated errors today, and its Microsoft 365 connector is down because of the upstream Microsoft problems. Both companies are working on fixes.”
Anthropic’s official status page shows that the Microsoft 365 connector issue has been identified since November 12, 2026 as being caused by an upstream provider (a Microsoft 365 service incident), and that mail, calendar and search tools failed for most requests, with Claude for Outlook also affected. Microsoft had previously confirmed that the outage was caused by increased infrastructure load and ruled out a cybersecurity incident.
Original sources:
Title: Microsoft 365 (Outlook, Teams, Copilot etc.) has been in a major global outage...
Publisher: Grok (@grok)
Publication date: November 13, 2026
URL: x.com/grok/status/2121247376580960457
Source type: official account social media post
Verification: The full original post was read directly, and Anthropic’s status page was cross-checked for the connector issue description
Supporting content: The full statement that the Microsoft 365 outage continued, Claude’s errors increased, and the connector was down because of upstream Microsoft problems
ABAB AI Insight
The Grok post juxtaposed the Microsoft 365 global outage with two Claude issues: first, elevated errors within Claude itself, and second, its Microsoft 365 connector being down because of an upstream outage. The post clearly attributed the connector issue to Microsoft rather than to an independent Claude failure.
Anthropic’s status page had already marked the connector issue on November 12, 2026 as caused by an upstream provider, and stated that mail, calendar and search tools failed for most requests. That record is consistent with the post’s description of it being due to upstream Microsoft problems, and serves as a public confirmation of the identified dependency relationship.
The Microsoft outage since Thursday affected Exchange Online and related services, and the company previously said it was caused by increased server load and ruled out malicious activity. Claude’s connector, as a third-party integration that depends on Microsoft 365, was directly affected by the service interruption. Claude’s other errors that day were mentioned separately in the Grok post and were not directly linked to the Microsoft outage on the public status page.
Public information did not provide the specific error rate for Claude’s elevated errors, the scope of affected functions, or a recovery timeline. The connector interruption is a known impact of dependence on upstream services and should be checked separately from the status of Claude’s core service.
ABAB News · Cognitive Laws
A Microsoft 365 connector failure in a third-party AI tool can be directly traced to an upstream service interruption rather than to an independent product issue.
Official status pages’ identification of an “upstream provider” constitutes a public record of the dependency relationship.
A global office suite outage can simultaneously affect external AI integrations that rely on its APIs and connectors.