Microsoft 365 Consumer Outage History

Microsoft Copilot experienced access failures for some users, with affected users receiving 401-error response codes when attempting to use the service. The incident lasted 32 minutes and has been resolved.

Microsoft 365 Copilot experienced a potential service issue that lasted 24 minutes. Microsoft investigated the problem and checked for impact to user organizations. The incident was classified as major status but was resolved within the initial investigation timeframe.

Microsoft 365 Copilot users were unable to select "Allow editing" when using Copilot through Word or Excel, forcing them to only use "Chat mode" for queries. The issue was caused by a recent update that incorrectly marked "Allow editing" and other agent mode functionalities as unavailable to non-premium users. Microsoft deployed a code fix that reached 90% completion during the 7.8-hour incident.

Microsoft 365 Copilot Chat experienced a potential service issue that lasted 4 minutes. Microsoft investigated the incident and checked for impact to user organizations. The issue was resolved quickly with the service returning to normal operation.

Microsoft 365 Consumer users experienced intermittent issues signing in to Outlook.com. The incident was related to a persistent issue from a previous case (OL1292958) that continued to affect user access. Microsoft resumed their investigation, analyzing service telemetry to determine the scope and next steps for resolution.

Microsoft 365 Consumer users experienced intermittent sign-in failures to Outlook.com for 28.5 hours, with users reporting "too many requests" errors and unexpected sign-outs, particularly affecting iOS users accessing Outlook and Hotmail through the default Mail app. Microsoft resolved the issue by rolling back a backend configuration change that was causing authentication key failures. iOS users were required to manually re-enter their passwords through iPhone Settings > Mail > Accounts to restore access after the service was fixed.

Microsoft Copilot for personal use experienced intermittent service issues for 1.5 hours due to decreased performance on supporting infrastructure. Users encountered error messages including "Having trouble with requests" and "I'm sorry, I'm having trouble responding to requests right now." Microsoft investigated recent changes that may have contributed to the performance degradation and resolved the issue.

A recent Windows update introduced a regression that caused Microsoft Teams Free users on Windows to intermittently be unable to join meetings or access the service, with users seeing authentication error messages stating "We couldn't authenticate you" due to device, network, or technical issues. The incident affected multiple Windows versions (25H2, 24H2, 23H2, and 22H2) and lasted 47.3 hours while Microsoft developed a fix to address the regression. Users could temporarily resolve the issue by restarting their computers as a workaround during the incident.