Microsoft apologises and explains what is causing Outlook, Teams outage

Microsoft has apologised for the global Microsoft 365 outage that left millions unable to use Outlook, Teams and Copilot for nearly 24 hours. The company says the disruption was a technical issue "not related to cyber or AI." It was caused by a flaw from an earlier network capacity upgrade that surfaced after a recent network change. Outlook and Teams are now recovering worldwide, and a full post-incident report will follow.