A widespread Microsoft 365 outage disrupted Outlook, Teams, Copilot and other Microsoft 365 services on Thursday, 12 November 2026, affecting users across 74 countries and territories, according to outage tracking platform Downdetector. The disruption prevented some users from accessing emails, workplace communication tools and cloud-based business applications. Microsoft confirmed problems with parts of its infrastructure and began restoring affected servers, with the outage raising concerns about the reliance of businesses and employees on cloud services for daily operations.