Microsoft Teams

Massive Microsoft 365 Outage Disrupts Outlook, Teams, Copilot and Exchange Online Worldwide

Microsoft is investigating a widespread outage affecting multiple Microsoft 365 services including Outlook, Microsoft Teams, and Copilot. The incident began at 1:26 PM ET on Thursday and impacted Exchange Online, SharePoint Online, Microsoft Defender XDR, Azure, and OneDrive. Microsoft initially attributed the disruption to elevated infrastructure load but later confirmed that a number of servers unexpectedly became unavailable. The company paused all deployments, redistributed connection traffic, and began restarting affected servers to restore capacity. The outage follows a separate Microsoft Teams incident earlier the same day that affected users in North and South America from 9:45 AM to 10:53 AM ET.