Microsoft 365 services, including Teams, Outlook, and Copilot, suffered a significant outage Thursday morning. The disruption, which began around 12:00 AM UTC, affected thousands of users across Japan and China. The incident caused login failures and performance issues, impacting business operations during peak regional hours.
Microsoft engineering teams identified the root cause as a critical routing misconfiguration within the company's internal infrastructure. The company confirmed the disruption was not the result of a cyberattack.
Microsoft responded by rebalancing traffic across redundant systems. By 7:40 AM GMT+5:30, the company confirmed services were restored for all affected users. Microsoft also assured customers that no data was lost during the incident.