“We’re investigating an issue where users may be experiencing intermittent issues accessing https://t.co/ZUfyjth6sU,” stated Microsoft 365 Status early Tuesday.
On April 27, 2026, Microsoft Outlook and Hotmail services faced a significant disruption. Users reported persistent login failures. They found themselves locked out of accounts despite entering correct credentials.
The outage affected both desktop and web versions of Outlook. Users experienced repeated password prompts and authentication errors.
This issue appears linked to Microsoft’s identity verification infrastructure. Corporate users reported internal communication breakdowns due to the outage.
Many organizations initiated internal security checks, fearing potential breaches. Microsoft officially recognized the mess, stating it was part of a broader Outlook service outage impacting users more widely.
Downdetector indicated that the problem was affecting many users across the United States and the United Kingdom. Experts suggest implementing contingency plans for backup communication systems amid such service degradation.
Microsoft began deploying fixes shortly after acknowledging the issue. The company’s cloud architecture allows for rapid intervention during outages—though no timeline has been shared for full resolution.
This incident raises questions about the long-term reliability of Microsoft Outlook. It serves as a reminder that even established cloud services are vulnerable to technical failures.