Microsoft said it had restored Microsoft 365 service to all affected customers and regions after an outage lasting more than 24 hours disrupted Outlook, Teams and other applications worldwide. The company said the outage was a technical issue, not a cyberattack or a problem related to AI agents. It attributed the issue to an earlier network capacity upgrade and said it emerged after a recent network change.
The outage affected Exchange Online mailboxes, features linked to Microsoft Copilot and connections between Microsoft 365 and AI assistants. Government agencies in Japan, Singapore and the United States had email problems. Microsoft said it would publish a full report after its review.
