Microsoft 365 went down for thousands of users across North America on July 23, 2026, taking Teams, SharePoint, OneDrive, Outlook, Xbox Live, and the Microsoft Store with it. Downdetector recorded 2,403 outage reports at 11:11 a.m. ET — far above the normal baseline of about 29. SharePoint accounted for 78% of complaints, with users seeing a generic “Something went wrong” error when trying to open files. Excel and OneDrive access was also intermittent for many accounts.
Microsoft acknowledged the incident under reference MO1437424 in the Microsoft 365 Admin Center and said engineers were investigating specific network paths as the likely source of disruption. No security breach or data loss has been reported — the issue appears to be an infrastructure problem, not an attack. Microsoft said it used diagnostic data from affected servers to narrow down the root cause and begin mitigation. Most services are expected to recover as the investigation progresses; check the Microsoft 365 Service Health dashboard for the latest status before calling your IT helpdesk.