Microsoft Outage Disrupts 365 Services and AI Connectors

Microsoft Corporation managed two separate email disruptions on November 12, 2026. The first affected consumer accounts including Outlook.com and Hotmail, where a mistake in spam enforcement rules caused incoming messages to bounce. Microsoft restored this functionality by rolling back the problematic update.

A more severe global outage subsequently disrupted Microsoft 365 enterprise services, including Exchange Online, Teams, SharePoint Online, Copilot 365, and Defender XDR. The company determined the crisis was caused by a large number of servers becoming unexpectedly unavailable, which shifted an elevated load onto the remaining infrastructure. Microsoft clarified that the issue was not driven by an increase in user traffic, but likely by failed health checks from a specific component.

Recovery efforts involved pausing deployments, restarting servers, and redistributing connection traffic across the global network. Microsoft acknowledged that initial actions did not provide the anticipated relief, necessitating a gradual recovery process. The outage extended to third-party AI services, as OpenAI and Anthropic both reported broken Microsoft 365 connectors that hindered their tools' functionality.

Thousands of users across the Americas, specifically in the United States and Canada, reported connectivity problems. Downdetector recorded over 130,000 outage reports for Outlook alone during the peak of the disruption.