Disable AdBlock, uBlock, or other content-blocking extensions for Outlook.com, then refresh the page; Microsoft documents these extensions as a cause of emails failing to load. ^1^
Try these steps in order
- Open Outlook directly at https://outlook.live.com/mail/.
- If you use AdBlock, select its icon in the browser toolbar and choose Don’t run on pages on this domain.
- Temporarily turn off any other ad, pop-up, script, or privacy-blocking extensions—especially uBlock.
- Refresh Outlook and open an email.
Microsoft notes that Outlook.com can have loading problems when ad or pop-up blockers are enabled. ^2^
If the page remains blank
- Open an InPrivate/Incognito window and sign in to Outlook.com.
- If email works there, the problem is likely associated with normal-browser site data or an extension.
- Clear cookies and cached data for Outlook/Microsoft sites.
- Close all browser windows, reopen the browser, and sign in again.
- Test a current version of another supported browser:
- Windows: Edge, Chrome, or Firefox
- macOS: Edge, Chrome, Firefox, or Safari 16 or later ^2^
- Try Outlook.com on a phone or another computer. If it works there, the issue is isolated to the original browser or device.
If it fails everywhere
Check Microsoft’s Outlook.com known-issues page for a service problem. ^3^
If no matching incident is listed, select Help in Outlook.com, enter the problem, then scroll to Still need help? and select Yes to contact support. If Outlook.com cannot load far enough to access Help, use Microsoft’s sign-in support option. ^4^
References
- Fixes or workarounds for recent issues on Outlook.com | Microsoft Support
- Supported browsers for Outlook on the web and Outlook.com | Microsoft Support
- Fixes or workarounds for recent issues on Outlook.com
- Can't send or receive email in Outlook.com | Microsoft Support