Microsoft Outlook experienced a significant global outage on Monday, April 27, as thousands of professionals in the United States began their workweek. Reports indicate that users encountered "Account Not Authenticated" messages following a disruption that started early in the day, leaving them unable to access their inboxes during peak business hours.
Downdetector Reports
According to the reporting site Downdetector, more than 1,000 formal complaints were logged, with 68% of users stating they were completely unable to log in. Others reported issues with the app and receiving messages.
Microsoft's Response
Microsoft has officially acknowledged the issue, classifying it as a "service degradation" on its Service Health dashboard. The company's engineering teams are working to resolve the infrastructure glitch, though the exact cause has not yet been confirmed.
"We're investigating an issue where users may be experiencing intermittent issues accessing Outlook.com," the company stated. "We've discovered some users may experience intermittent sign-in failures, including 'too many requests' errors, or unexpected sign-outs. We're analyzing service telemetry further to identify any potential next steps and mitigation actions."
Affected Services
According to the Service Health Status, Outlook is experiencing problems. The company provided the following details for Microsoft consumer products:
- Service degradation for Microsoft products and services designed for personal use by families, individuals, and students.
- Outlook.com is experiencing service degradation, with users potentially facing issues accessing the platform.
The outage has impacted a wide range of users, from individual consumers to professionals relying on Outlook for business communication. Microsoft continues to work on a fix, and further updates are expected as the situation develops.
