Microsoft’s Outlook, Teams and Copilot services were disrupted on Nov. 12, 2026, in a Microsoft 365 outage that stretched into Friday business hours across Asia-Pacific, including India. Microsoft reported a partial recovery as it worked to stabilise affected servers. Downdetector logged more than 130,000 U.S. reports of Outlook problems at the peak.
The Microsoft outage affected services that rely on Exchange Online, Microsoft’s cloud email and calendar platform. Some Outlook users struggled to open their mailboxes or receive email, while Teams users encountered problems viewing calendars, scheduling meetings and sending invitations. Most Teams calls, meetings and group chats remained available, Microsoft said. A separate Teams chat outage earlier on Thursday lasted 68 minutes and caused delayed or failed messages for some users whose connections were hosted in or routed through North and South America.
The latest episode is among 24 major disruptions since 2001 to 2026. In January 2001, a router configuration change made Microsoft.com, MSN.com and other company websites unreachable. A decade later, a domain-name system problem disrupted Office 365, Hotmail and SkyDrive for several hours. Early Azure failures included a leap-day software bug in 2012 and an expired security certificate that disrupted secure connections to cloud storage worldwide in 2013.
More recent incidents show how a failure in shared infrastructure can affect several products at once. In January 2023, a network outage disrupted Azure, Teams and Outlook worldwide. An October 2025 configuration change in Azure Front Door, Microsoft’s global traffic delivery service, also disrupted Microsoft 365. In January 2026, another Microsoft 365 outage affected Outlook email and the creation of Teams chats and meetings. The chronology also covers consumer disruptions, from intermittent Xbox Live failures over the 2007 holiday period to the 2009 Sidekick server failure.
The published earnings-call transcripts from Oct. 29, 2025, the day of the Azure Front Door outage, and Jan. 28, 2026, six days after the Microsoft 365 outage began, contain no discussion by Nadella of those incidents. For the chronology, attribute the causes, recovery timelines and fixes to Microsoft’s service notices or engineering reviews.