A widespread outage of Microsoft 365 services, including Outlook, Teams, and Copilot, disrupted operations across at least 74 countries. The failure impacted over 140,000 users and persisted into a second day, affecting businesses, governments, and healthcare systems globally.
Microsoft attributed the disruption to automated server health checks and high processor usage. The company denied that the outage was caused by malicious activity or a cyberattack and committed to releasing a Post-Incident Report detailing the root cause.