Microsoft Expands Rollout of Microsoft 365 Outage Patch, Improving Stability on Some Servers

Shenchao TechFlow reported on November 13 that, according to Cointelegraph, Microsoft said the patch for the large-scale Microsoft 365 outage has improved stability on some servers, and the company is expanding its deployment, but has not provided a timeline for full service restoration.

The outage prevented some users from accessing Exchange Online mailboxes and affected Teams meeting scheduling and invitation delivery. OpenAI reported errors with ChatGPT’s Microsoft 365 connector; Anthropic said most email, calendar and search requests through Claude’s connector failed.

Microsoft said the process handling secure connections became overloaded, causing affected servers to stop processing requests; there are currently no signs of a security breach.

Source: Shenchao TechFlow