Claude Users Locked Out Amid Outages

Claude users encountered login difficulties on Friday as Anthropic began investigating a significant outage impacting its AI services. The issues primarily affected Claude.ai, Claude Code, and the developer platform, with elevated error rates reported.

Anthropic confirmed that authentication problems were under investigation. The outage impacted user access to both the chatbot and coding assistance tools. Specific details regarding the cause and expected time for service restoration have not yet been provided.

This disruption occurred concurrently with ongoing issues affecting Microsoft 365 services. Microsoft's services, including Outlook and Teams, had been experiencing outages for a second consecutive day since Thursday afternoon.

While Anthropic has not directly linked its authentication problems to the Microsoft outage, it noted a separate issue concerning Claude's integration with Microsoft 365. This integration has failed for Outlook emails, calendar, and file access.