Force reload + sign in screen

Hi,

I can understand how frustrating this is, especially since you’ve already cleared the cache and tried Private Browsing, and your school account works elsewhere.

Since the issue seems limited to Outlook in Safari, could you try the following?

1. Open https://outlook.office365.com/ directly and sign in with your school account, rather than selecting a saved account on the sign-in page.
2. If it still redirects you to the sign-in screen, try accessing Outlook using another supported browser, such as Microsoft Edge or Chrome, on the same device.
3. If the issue only happens in Safari, check whether Safari is blocking cookies or whether any content-blocking extensions are enabled.

Microsoft’s guide explains how to sign in to Outlook on the web: How to sign in to Outlook on the web | Microsoft Support

If the same loop occurs in another browser, please contact your school’s IT administrator to check whether there’s an account or sign-in issue, especially since you previously received a message saying your account couldn’t be found.

One question that would help narrow this down: Are you using Safari on an iPhone/iPad or a Mac? Also, when the sign-in loop happens, do you see any error message, or does it simply return to the account selection screen? Looking forward to your response.