Microsoft's cloud productivity subscription for enterprises and governments, covering Outlook, Teams and more.
Microsoft's core services including Teams, Outlook and Copilot have suffered a massive outage across more than 70 countries since Thursday, affecting an estimated 430 million Microsoft 365 users, with institutions such as the UK Parliament and the Philippine Supreme Court impacted. Microsoft said its remediation attempts are not taking effect as expected and confirmed the incident was not caused by a cyber-security breach.
Microsoft's core Microsoft 365 services, including Outlook and Teams, suffered a global outage lasting over 10 hours without full recovery. Microsoft ruled out a traffic surge and traced the failure to a large number of servers failing automated health checks and being marked offline, overloading the remaining capacity. Japan's GSS government platform was affected, forcing agencies to fall back on phones and chat tools, while connection components relied on by OpenAI and Anthropic were also impacted.