Using older versions of Outlook for Mac for personal email and calendar
This can be caused by either a Microsoft service issue or a browser/add-on problem.
Try these checks in order:
- Check Microsoft service status. If Outlook.com service status is not green, wait until the service is running normally and try again.
- Sign out manually, then close all browser windows, and sign in again.
- If the inbox or emails still do not load, disable browser ad blockers or pop-up blockers such as AdBlock or Ublock, then refresh Outlook.com.
- If using Firefox, disable or remove add-ons because certain Firefox add-ons can prevent the Outlook.com inbox from loading.
- Try opening the mailbox in Microsoft Edge or another browser.
- If sign-in works but the mailbox still will not open, use the Outlook.com Help pane after signing in. If sign-in is not possible, use Account support.
Based on the documented issues, this can be on Microsoft’s end when there is an active service problem, but browser extensions are also a known cause of Outlook.com not loading.