Global Microsoft Outage Hits Over 70 Countries and Triggers Share Drop

Microsoft shares fell nearly 3% in pre-market trading after a massive global outage disrupted core productivity tools, including Outlook, Teams, and the Copilot artificial intelligence assistant, for more than 12 hours. The software giant stated that the disruption affected a wide range of Microsoft 365 services that interact with Exchange Online and email systems, impacting users across more than 70 countries and territories. According to BBC News, monitoring website Downdetector recorded 140,000 reports from 74 countries regarding Outlook issues on Thursday evening, though the real figure is likely much higher since the platform relies on self-reporting. Microsoft's website notes that more than 430 million people use Microsoft 365 apps. Engineers traced the root cause to elevated server loads and infrastructure issues after several servers unexpectedly failed automated health checks. This unexpected failure forced the remaining servers to handle extra traffic, creating severe traffic-management imbalances and connectivity errors. Microsoft confirmed that it was not aware of any malicious activity or cyberattack behind the incident. Other tech platforms also felt the impact, as ChatGPT-maker OpenAI and Anthropic reported problems due to connections with Microsoft's services. The widespread disruption hit operations across multiple sectors and countries. Government agencies, schools, and hospitals faced difficulties, with Australian and Japanese government bodies, US city governments, Australian spy agencies, and courts from Los Angeles to Texas reporting communications or IT platform disruptions. In the UK, GP surgeries, pharmacies, police forces, and schools were affected, while Canadian public broadcaster CBC noted email issues at a Toronto healthcare network. Indian airlines including IndiGo, Akasa Air, and Air India reported that their email support services were disrupted, and financial firms in Taiwan faced fund management challenges, with one firm resorting to fax machines to confirm trades. Microsoft later reported signs of stabilization and encouraging recovery progress in Europe and North America after implementing broader fixes, though a complete and sustained recovery remained its primary goal.

Context

Microsoft 365 forms a central part of digital infrastructure for millions of businesses, schools, and government offices around the world. When major cloud and software ecosystems face prolonged technical failures, organizations that depend entirely on a single technology provider often struggle to maintain basic daily communications and workflows. This latest incident follows previous service interruptions earlier in the year, highlighting the heavy reliance of modern global enterprise systems on centralized cloud networks.