Microsoft apologizes for global service outage, says the disruption was not caused by a cyberattack.

On November 13 local time, Microsoft Corporation expressed its deep apologies for a global service outage that affected millions of users. Microsoft stated that the incident was "not related to a cyberattack or AI/agents," but was triggered by an earlier "network capacity upgrade." Microsoft had previously said that recovery efforts were progressing "encouragingly" and that it was currently working to eliminate the "aftereffects" left by the outage. The incident had rendered Teams, Outlook, and the AI software Copilot unavailable in at least 70 countries. Microsoft had also warned earlier that some users might experience "intermittent access issues." The UK's National Health Service said the outage "inevitably" caused disruption to staff, but appointment services could still proceed as usual; some schools asked parents to contact them by phone; in addition, the U.S. federal government and court systems also reported related issues.