Microsoft Outlook issues today: Why you can't log in

Workers trying to log in to Microsoft Outlook experienced unexpected problems Monday morning, with some users receiving error messages and unexpected signouts.

On its official Microsoft service status page, the company confirmed that some Microsoft 365 Business and Enterprise customers were experiencing a service interruption, directing them to X for more information.

The Microsoft 365 Status page on X stated that some customers were unable to log in to the email software.

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"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."

Around 9:35 a.m. ET, the Microsoft 365 Status X account posted a further update, which stated that the issues were ongoing.

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The platform DownDetector also reported a spike in user error reports beginning around 5 a.m. ET Monday morning, with a majority of users identifying login issues as the problem.

(Disclosure: DownDetector and Mashable are both owned by the same parent company, ZiffDavis.)

Microsoft Outlook also experienced an outage in January.

This is a developing story...