Microsoft Outage: Why It Lasted So Long and Will Your Emails Arrive?

Microsoft is resolving a major outage affecting Microsoft 365 services like Outlook, Teams, and Copilot, with email backlogs nearly cleared after over 24 hours of disruption. The company confirmed the issue was technical, not a cyberattack, and apologized for the impact. The outage, reported in at least 74 countries, disrupted email, calendar, and file access for millions of users, including schools, hospitals, courts, and government agencies. Microsoft attributed the cause to a network capacity expansion problem and warned of intermittent access issues as services recover. Delayed emails may still arrive, as Microsoft extended the timeout window to 48 hours to protect messages during recovery. Experts say the prolonged fix stems from cascading server failures and massive reconnection attempts, making a gradual restoration necessary.