A major outage occurred in Microsoft 365, the cloud service operated by US technology giant Microsoft, rendering Outlook, Teams, Copilot and other services unavailable. The impact has spread to government infrastructure, local governments such as Osaka Prefecture, and companies.
A major system outage has occurred in Microsoft 365, Microsoft’s cloud-based service, affecting Outlook email sending and receiving, Teams chat and other functions including Copilot. Outages have been reported around the world, affecting government agencies and private-sector companies.
The government disclosed that an outage had also been confirmed in GSS, the government’s information systems infrastructure. Osaka Prefectural Government offices have also reportedly been unable to use Outlook. Governor Yoshimura Hirofumi (吉村 洋文) indicated a policy of handling matters on site by telephone and other means.
Users affected by the outage have reported that only email notifications reach their devices and that the actual email messages cannot be received. Users have reportedly been forced to use alternative means and switch to counter services.
Microsoft cited unexpected failures involving multiple servers and increased load on its infrastructure as the cause, and is proceeding with restoration work while expecting the situation to improve.