Microsoft apologised after a global outage disrupted Outlook, Teams, and other services starting on Thursday, November 12. The company said a network change caused the issue but ruled out a cyberattack. Charles Lamanna said, "recovery was progressing encouragingly," as teams worked to restore normal services across all affected infrastructure.
Microsoft said the mass outage, which disrupted Outlook, Teams and other Microsoft 365 services, was caused by an issue linked to an earlier network capacity upgrade that surfaced after a recent network change. Apologising to customers and partners for the disruption, the company ruled out the possibility of a cyberattack.
Microsoft Executive Vice President for Copilot, Agent and Platform Charles Lamanna said the company was reviewing the incident and working to prevent similar disruptions in the future. Providing an update on Friday’s outage affecting Outlook, Teams and other Microsoft 365 services, Lamanna said recovery was progressing encouragingly, with service availability and email delivery performance improving across an increasing portion of the affected infrastructure.
The outage, which began on Thursday (November 12, 2026), disrupted email access, calendar services and workplace communication, affecting operations across several businesses and government agencies. Microsoft is testing fixes, rerouting network traffic and expanding server capacity as it works to stabilise its systems and restore normal services.