US-based Microsoft announced the full restoration of its Cloud service 365 following a major outage. It said that functions including Outlook, Teams, Copilot and SharePoint, which had become unavailable during the outage, had recovered, and explained the cause and plans for a future report.
On the 13th, US-based Microsoft announced that its Cloud service “Microsoft 365” had been fully restored following a major global outage. The affected services included email and AI assistance functions. Multiple services had become difficult to use during certain periods.
The same day, Microsoft posted on X, formerly Twitter, saying, “We deeply apologize for the disruption caused,” and stated that the outage was caused by a technical issue rather than a cyberattack. The investigation into the cause has not been completed, and the company said it would publish a detailed report.
The affected services included Outlook, Teams, Copilot and SharePoint. The outage initially affected users in the United States, but it was later indicated that it could affect all regions. The causes cited included multiple servers becoming unexpectedly unavailable, placing a burden on the remaining systems, and failed health checks causing the outage to spread.
Recovery work is currently said to be under way through the restart of affected servers and traffic routing to avoid concentrating communications on specific servers. Microsoft Japan also explained that “no evidence suggesting a cyberattack has been confirmed.”