Microsoft 365 users across North America endured a prolonged, high-impact disruption on January 22–23, 2026, as core services including Outlook, Exchange Online, OneDrive, Microsoft Defender, and Microsoft Purview were intermittently unavailable or sluggish for nearly ten hours whatile engineers worked to restore and rebalance traffic across affected infrastructure.
Background
The incident began in mid-afternoon Eastern Time on January 22, 2026, when system telemetry and user reports...