My University account just expired and I have just subscribed My Id for the University account wont let me in.

Just to clarify, were the subscription given to you through school, and it expired because you have graduated, or?

I need this clarification because subscription through schools are all managed via school's IT, not via you directly with Microsoft.

The installed Office apps are still tied to the expired university (work/school) Microsoft 365 license. To keep using Word/Excel/Outlook on Mac with a new personal subscription, the old license must be removed and the apps reactivated with the new account.

Follow this sequence on the Mac:

1. Confirm the new personal subscription

• In a browser, sign in at https://www.office.com with the personal Microsoft account that was used to buy Microsoft 365.
• Verify that the subscription is active and that the Install apps option is available.

2. Remove the old university license from Office

• Open any Office app (for example Word).
• Sign out of the university account from Word → Preferences → Accounts (or from the account/profile menu in the app) so no work/school account remains signed in.
• Quit all Office apps.

3. Completely remove the old Office activation If the apps still prompt for the university “access gate” or work/school sign-in, fully remove the old license and cached identity (on Mac this is typically done by removing Office-related license/identity files, then reinstalling). The moderator guidance in similar cases is to remove the old license and then register/activate with the new one.
4. Reinstall Office from the new subscription

• Go to https://www.office.com in a browser.
• Sign in with the personal Microsoft account that has the active Microsoft 365 subscription (not the university account).
• Select Apps → Install apps to download the Mac installer.
• Run the installer and complete setup.

5. Activate with the new account

• Open Word (or another Office app).
• When prompted to sign in, use the personal Microsoft account that owns the new subscription.
• After activation, the apps should open without the university access prompt and allow editing/creating documents.

If the apps still show subscription or unlicensed messages after these steps, verify again that the personal subscription is active and correctly associated with the Microsoft account, as described in the subscription and activation articles.

References:

• Why do I need an account to sign in to Microsoft 365 or Office?
• Download, install, or reinstall Microsoft 365 or Office 2024 on a PC or Mac
• Unlicensed Product and activation errors in Office
• A subscription notice appears when I open a Microsoft 365 application
• Can't type in Word documents - Microsoft Q&A
• Can't sign in to microsoft 365 desktop apps - Microsoft Q&A
• Why does office 2024 home for mac require activating microsoft 365 subscription? - Microsoft Q&A