New Delhi, Nov. 13 -- Microsoft services began coming back online after a global outage left millions of users without access for nearly 18 hours, disrupting businesses, schools, government agencies, and airline operations across at least 74 countries, including the United States.

Major services impacted during the event included Outlook email, Microsoft Teams, and Copilot. The disruption also affected airline operations worldwide, prompting major Indian carriers to issue passenger advisories.

According to Microsoft 365 Status (the official Microsoft account for updates on certain Microsoft 365 service incidents), the outage was not caused by a cyberattack. Instead, overwhelmed servers responsible for establishing secure connections fai...