REDMOND — A sweeping global cloud infrastructure outage affecting Microsoft’s flagship productivity suite has stretched well past 12 hours into Friday, locking millions of enterprise and public sector users worldwide out of Outlook email, Microsoft Teams collaboration tools, the Copilot artificial intelligence assistant, and core Microsoft 365 applications. Beginning around 18:00 GMT on Thursday evening, incident tracking platform Downdetector logged upwards of 140,000 problem reports, with outage notifications surging to more than 2,000 times normal baseline levels and spanning 74 countries and territories within roughly an hour across North America, Europe, Asia, and Oceania.
Addressing global security concerns, Charles Lamanna, Executive Vice President at Microsoft, confirmed that the prolonged disruption does not stem from malicious activity or a cybersecurity breach. Instead, Microsoft engineering teams isolated the primary bottleneck to Exchange Online server infrastructure experiencing severe load imbalances and traffic management failures. Early automated remediation attempts faltered overnight after restarted server clusters repeatedly stopped responding once live user traffic returned. By Friday morning, Microsoft reported early signs of server stabilization after deploying a targeted software patch and transitioning to phased, controlled traffic reintroduction, while extending its email timeout window to 48 hours to prevent delayed messages from bouncing before full recovery is achieved.
The prolonged communications blackout triggered immediate operational knock on effects across financial markets, municipal governments, judicial courts, healthcare networks, and international airlines. Across the United States, municipal governments nationwide reported widespread civil email disruptions, while major artificial intelligence developers including OpenAI and Anthropic also flagged operational impacts tied to the Microsoft 365 degradation. In Europe, pan European stock exchange operator Euronext, which manages bourses across Paris, Amsterdam, Brussels, Milan, Madrid, Oslo, Athens, and Lisbon, formally instructed listed corporations on Friday morning to communicate regulatory filings and corporate actions via telephone after losing access to incoming Outlook email.
In the United Kingdom, where active disruptions persisted across roughly 60 countries primarily in Europe and Asia on Friday, the National Health Service (NHS) and the National Pharmacy Association warned of prescription processing delays and referral bottlenecks affecting general practitioner clinics and NHS 111 channels due to unavailable NHS email systems, though core clinical records remained operational. Concurrently, British law enforcement agencies including London’s Metropolitan Police advised citizens to dial emergency telephone lines after online crime reporting portals went offline, while Australian state governments confirmed Microsoft was prioritizing life, safety, and government infrastructure restoration ahead of publishing a comprehensive post incident root cause and defense in depth report once full service stability returns.
