Global Microsoft Outage Halts Services Worldwide

A major global Microsoft outage has hit schools, hospitals, and businesses around the world, disrupting emails and artificial intelligence tools. Microsoft 365 services like Teams, Outlook, and the Copilot AI software have suffered severe connectivity problems. Over 430 million people use Microsoft 365 apps. Monitoring site Downdetector received 140,000 reports from 74 countries regarding Outlook on Thursday evening, though the real number of affected users is likely much higher.

Global Impact

The disruption has spread to many sectors and countries. Tech giants OpenAI and Anthropic reported problems with their connections to Microsoft services. City governments in the US, Australian spy agencies, and courts from Los Angeles to Texas warned of delayed communications. In Canada, a Toronto healthcare network running several hospitals faced email issues, though patient care was not affected. Japan reported disruptions to its shared IT platform, while UK GP surgeries, pharmacies, police forces, and schools also faced problems.

Cause And Fix

Microsoft ruled out a cyber-security incident and stated the outage was caused by elevated load on its infrastructure. A large number of servers became unexpectedly unavailable, sending extra traffic to the remaining servers and straining them. Microsoft stated that early signs of stabilisation appeared on Friday morning with progress made toward restoring platforms, though some intermittent issues might continue.

Context

Elevated load occurs when computer servers handle a much higher volume of stress and user traffic than normal. Major tech outages highlight how heavily modern governments, businesses, and public services rely on centralized cloud infrastructure for everyday communication.