Updated on April 27 at 4:15 p.m. ET — After rolling back a series of recent updates, Microsoft says that the Outlook issue has been resolved for most users. However, according to the latest update, iOS users may still be unable to access Outlook.
"System telemetry indicates that the service is recovering following the configuration roll back. Impacted iOS users on iPhones will need to follow additional steps to resolve the issue. For the list of steps and more information, please visit https://status.cloud.microsoft."
Strangely, the linked website does not provide additional information, at least not for all visitors. However, Outlook users on iPhone should try the following steps, courtesy of our colleagues at CNET:
Open Settings on your iPhone
Go to Mail
Go to Accounts
Select your Outlook account
Enter your Outlook password in the Password field.
Tap Done
Re-open the Mail app
User error reports remain elevated on DownDetector, though they are down from their peak earlier this afternoon. (Disclosure: DownDetector and Mashable are both owned by the same parent company, ZiffDavis.)
Updated on April 27 at 3:04 p.m. ET — The bad day at Microsoft continues to get worse as the ongoing Microsoft Outlook outage continues to lock many users out of their accounts.
Earlier this afternoon, Microsoft announced it was rolling back a previous update that may have caused the bug. However, Microsoft later said that the "roll back that was completed does not appear to have provided the intended impact relief," as reported by our colleagues at CNET.
Meanwhile, the Microsoft 365 status account on X posted a series of updates on an apparently unrelated Microsoft Copilot outage.
Updated on April 27 at 1:40 p.m. ET — On its X status page, Microsoft said that it's testing a potential fix for the ongoing Outlook outage. As of this writing, Outlook users are still complaining of login errors.
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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 and directed 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 stating 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. Microsoft Outlook error reports continued to climb on Monday morning as U.S. workers began their workweek.
Meanwhile, Microsoft users on X complained that they were still unable to access Outlook and criticized Microsoft for the lack of information regarding the issue. The Microsoft service status page directs users to X for more information, while the Microsoft 365 support profile on X directs users back to the website status page.
Microsoft Outlook also experienced an outage in January.
This is a developing story...
UPDATE: Apr. 27, 2026, 11:21 a.m. EDT This article was updated with more information about the Microsoft Outlook outage.