Microsoft resolved a day-long Outlook login outage on Monday by rolling back a recent configuration change. The issue, which began before 5 a.m. ET, affected users worldwide, particularly on iOS devices. Company officials confirmed service recovery but instructed iPhone owners to re-enter passwords in settings.
Microsoft Outlook users faced widespread login problems starting before 5 a.m. ET on Monday, with outage reports peaking at around 1,500 on Downdetector. The company identified a recent backend configuration change as the likely cause and completed a rollback around 3:36 p.m. ET. Microsoft's status page noted that internal logs confirmed the fix, though some users continued reporting issues into the evening, with over 1,000 concurrent errors as of 5 p.m. ET. A Microsoft spokesperson told CNET, 'We're working to mitigate an issue that may cause some users to experience intermittent Outlook.com sign-in failures on mobile apps.' iOS users must take extra steps to restore access, according to Microsoft's service status update. Owners should open Settings, tap Mail, select Accounts, choose the affected email, and re-enter the password before tapping Done. The company emphasized these steps are mandatory for full recovery, as system telemetry showed the service healthy post-fix. Microsoft confirmed other services like Teams remained operational throughout. Separately, Copilot experienced resource issues in North America, but that did not impact the Outlook outage.
