Anthropic's Claude Experiences Global Outage Following Microsoft Systems Failure
Claude services became unavailable for thousands of users worldwide amid a Microsoft systems outage. The company reported authentication issues and deployed a fix.

The Claude status page reported an increase in errors on the platforms claude.ai, Claude Code, and platform.claude.com. According to DownDetector, over 3,000 users reported issues.
The company clarified that it was investigating authentication problems in Claude.ai and Claude Code. Later, it announced the deployment of a fix and monitored the restoration of services.
The outage coincided with large-scale disruptions in Microsoft systems. Due to these, hundreds of thousands of users worldwide lost access to email and the Teams messenger. The corporation stated that the resolution of issues was not progressing as expected.
The disruptions began the day before and affected several Microsoft 365 services. Users reported being unable to send and receive emails in Outlook, as well as issues in Teams, Copilot, and other services in the suite.



