Microsoft Asks iPhone Users to Reauthenticate After Recent Outlook Service Outage

Post Views: 9

Microsoft Issues Alert After Widespread Outlook.com Outage

On Monday, April 26, 2026, a significant outage affected Outlook.com users worldwide, resulting in intermittent sign-in issues.

Cause of the Outage

According to Microsoft, the incident was caused by a “recently introduced change.”

The issues persisted for approximately 10 hours before Microsoft began mitigating the problem. During this time, some users experienced forced logouts and received “too many requests” errors when attempting to access their accounts.

Resolution and Workaround

iPhone Users:
Open the Settings app on the iPhone
Scroll down and tap on Mail
Select Accounts under the Mail settings
Tap on the account for which the password needs to be re-entered
Enter the updated or correct password in the Password field
Tap Done to save the changes
Open the Mail app to confirm that the account is syncing properly and emails are being sent/received

Although Microsoft did not specify the exact number of users affected or the regional scope of the outage, the incident was classified as causing “service degradation,” indicating notable user impact without taking the service offline for everyone.

Related Incidents

This incident follows a series of recent outages affecting Microsoft services, including an Exchange Online outage that blocked customer access to mailboxes and calendars via Outlook on the web, Outlook desktop, and other Exchange Online connection protocols in March. Additionally, Microsoft resolved separate issues causing sign-in problems for Microsoft 365 Copilot and Office.com in early April.

Ongoing Issues

As of now, Microsoft is continuing to investigate an ongoing issue causing the mouse pointer to disappear for some users in Classic Outlook, OneNote, and other Microsoft 365 applications, as well as a bug triggering “Cannot connect to the server” errors when creating groups in Classic Outlook.