A widespread outage at Microsoft brought Outlook, Teams and several other Microsoft 365 applications to a standstill for thousands of users globally on Thursday. 

Users faced disruption accessing emails, work files and productivity tools for over 10 hours during the outage.

The disruption also spilled over to third-party platforms, with OpenAI and Anthropic reporting issues with their Microsoft 365 connectors.

As per outage reports on Downdetector, outages in India peaked at 2,162 around 11:44 PM on Thursday (November 12. Reports climbed again to 2,254 around 8:59 AM.

Globally, Downdetector recorded more than 38,000 reports of Microsoft 365 problems and around 4,500 reports related to Microsoft Teams at around 2:07 PM ET on Thursday.

Microsoft initially attributed the disruption to elevated load across its infrastructure in multiple regions. Later, it clarified that the issue was not driven by an increase in traffic but by several servers becoming unexpectedly unavailable, placing additional pressure on the remaining infrastructure.

In an update on X, the company said it had paused all deployments, redirected additional traffic away from the affected infrastructure and begun restoring services.

“We determined the elevated load isn’t driven by an increase in traffic, but by a number of servers being unexpectedly unavailable; straining the remaining infrastructure. We’re working to safely return them to service,” Microsoft said.

Microsoft has been issuing regular updates on X about its efforts to restore services. The company initially said it was testing a configuration change to address a problem that was causing servers to fail automated health checks and become unavailable.

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