Overview
- User error reports surged just after 10:30 a.m. ET on Thursday, July 23, 2026, with thousands of complaints recorded on Downdetector during the first hour of the disruption.
- SharePoint accounted for roughly 78% of the user reports while Excel made up about 11% and the Microsoft 365 Admin Center about 6%, according to Downdetector telemetry.
- Microsoft’s Service Health page shows ‘service degradation’ for multiple services and directs administrators to incident MO1437424 as engineering teams investigate; no root cause or full restoration time has been announced.
- Public reports also noted access anomalies at other cloud providers including AWS, Cloudflare, OpenAI, Dropbox and Fortnite during the same window, though no official connection to Microsoft’s outage has been confirmed.
- The outage has disrupted logins, file access and collaboration tools used by businesses and gamers, and could cause prolonged productivity and authentication issues for enterprises that rely on Microsoft cloud services while the company works to isolate the fault.