Microsoft restores 365 services after multi-day global outage

Microsoft has restored Microsoft 365 services to all customers following a multi-day disruption that began on November 12. The blackout affected Exchange Online mailboxes, Outlook, Teams, and the Copilot AI assistant across multiple regions. Microsoft blamed the disruption on elevated load on its infrastructure. The failure brought governments, courts, healthcare services, businesses, airlines, and banks across more than 70 countries to a near-standstill.

Past Outages

Such technology failures have grown more frequent in recent years. In July 2024, a corrupt configuration file for the CrowdStrike Falcon sensor caused around 8.5 million Windows devices to crash with the Blue Screen of Death, disrupting airports, hospitals, and banks worldwide. In October 2021, Meta platforms including Facebook, Instagram, and WhatsApp went offline globally for nearly six hours due to a faulty configuration change on routers. Amazon Web Services suffered a 14.5 to 15-plus hour regional outage in its US-East-1 hub in October, while Google experienced a massive infrastructure meltdown on June 12 that crippled Gmail, Drive, Meet, and Google Cloud Platform.

Context

Global reliance on centralized cloud services and software platforms means that a single technical glitch can halt essential services across dozens of countries in minutes. These recurring incidents highlight how interconnected modern critical infrastructure has become.