Microsoft Ties Outlook Outage to Unexpected Server Disruptions

An Outlook outage blocked business and consumer access to inboxes and expanded from an initial U.S. and Americas scope to any region, while disrupting several other Microsoft services.

The affected services included Teams, SharePoint, Copilot, Defender XDR, OneDrive and Office for the web. The disruption extended beyond email to services for video conferencing, file sharing, security, storage and online office work.

Microsoft attributed the incident to a large number of servers becoming unavailable unexpectedly. It did not explain why the servers were unavailable and said its investigation was continuing.