Microsoft announced on the night of the 13th that the major outage affecting its 365 business software had been fully restored. The cause is believed to have been past capacity expansions and recent network changes.
Microsoft, the US provider of Microsoft 365, announced full restoration on the night of the 13th (the afternoon of the 14th Japan time) following the major outage that affected public institutions and companies worldwide. Microsoft apologized for the disruption caused to customers.
The outage is believed to have been caused by an issue that arose during capacity expansions in the past and surfaced following recent network changes. Microsoft explained that it was not caused by a cyberattack or runaway AI.
The outage began on the 12th, and problems continued on the 13th in some services and regions. Microsoft said it would publish a report after completing its investigation.
Affected services included the Outlook email software and Teams, a business chat service, with problems including the inability to send or receive email. The outage affected more than 70 countries and regions.