A large-scale outage has occurred in Microsoft's cloud service Microsoft 365. Major applications, including Outlook, are unavailable, and no recovery timeline has been given. This report covers the situation as of the morning of the 13th Japan time.
On the 12th, Microsoft announced that a large-scale outage was affecting its enterprise cloud service Microsoft 365. Problems including users being unable to send email have occurred worldwide, and the company said it was working to mitigate the impact.
The affected services include the Outlook email software, Teams chat software, Copilot AI service and SharePoint information-sharing service. The outage initially primarily affected the United States, but a subsequent post said that it could affect users in all regions.
The cause was described as multiple servers unexpectedly becoming unavailable, placing a load on the remaining systems, and the company said recovery work was under way. In the United States, the impact has spread to government agencies and universities, with problems reported in email and calendar functions during a session of Congress.
According to local media reports, multiple universities, including the University of Chicago, and municipalities including North Las Vegas also experienced stoppages and delays in campus and public-service systems using Microsoft 365. There is still no recovery timeline, and users remain in a situation where they must await further updates.