Microsoft 365 users faced widespread access problems across Outlook, Teams and Copilot. Microsoft said some servers had unexpectedly become unavailable and began redistributing traffic and restarting infrastructure. Some services showed limited recovery, while the company had yet to announce complete restoration or a firm repair time for everyone affected by the disruption.
Microsoft 365 users reported widespread connectivity problems on November 12, affecting email, meetings, file sharing and AI-assisted work. Microsoft confirmed disruption across Outlook, Teams, SharePoint and Copilot. The affected services also included Exchange Online and its Defender XDR extended detection and response security service. Users in any region could be affected.[1], [2]
Microsoft said some servers had unexpectedly become unavailable, leaving the remaining infrastructure under strain. It attributed the increased load to that lost capacity rather than an increase in user demand. Engineers paused new deployments, redistributed traffic and restarted affected servers. They also investigated reversing a small number of recent configuration changes as recovery work continued.[1]
The company subsequently reported limited recovery after returning some servers to service and moving traffic along alternative routes. A core process had become overwhelmed, reducing available capacity and complicating earlier attempts to restore service. Returning servers were remaining stable in its latest update. Microsoft warned that applications could reconnect gradually and had not confirmed when all services would be fully restored.[1]
