BleepingComputer reports a massive Microsoft 365 outage that began at 1:26 PM ET on November 12, 2026, disrupting Outlook, Teams, Copilot, Exchange Online, SharePoint, and Defender XDR worldwide, which Microsoft traced to servers unexpectedly becoming unavailable rather than a traffic surge. An earlier Teams incident that morning, tracked as TM1550488, has been fully resolved, and Microsoft's ongoing recovery has brought limited progress, though it has not said when service will be fully restored.