Microsoft Outlook Outage History

Microsoft Outlook.com experienced a major service incident where users encountered intermittent issues signing in to the platform. The incident was related to a persistent issue from a previous case (OL1292958) and lasted approximately 4 minutes. Microsoft resumed their investigation by analyzing service telemetry to determine the scope and develop next steps for resolution.

Microsoft Outlook.com experienced a 28.5-hour service incident where users encountered intermittent sign-in failures, including "too many requests" errors and unexpected sign-outs, with iOS users being particularly affected. The issue was caused by a backend configuration change that resulted in authentication key failures, impacting users' ability to access their Outlook and Hotmail accounts through various clients including the iOS default Mail app. Microsoft resolved the incident by rolling back the problematic configuration change, though iOS users were required to manually re-enter their passwords through their device settings to fully restore access.