Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Hello
The issue you are having this time can be different, and is related to the recent digital license certificate update that happened on all Mac devices on July 13th.
Did you get an 0x0 error?
First, see if you can update your Office apps. Open Word for example, click on the 'Help' tab >Check for Updates. Make sure you choose Update All when prompted. Let the process run through, can take a bit time. See if that works.
Otherwise, use the Update method in this article: https://support.microsoft.com/support/known-issues/unknown-error-0x0-license-not-found-error-microsoft365-macos?apid=ets
If it still doesn't work, please uninstall the apps.
Then reinstall this way:
If you signed up via the Apple App Store, then download and install from the App Store.
If you signed up via Microsoft directly, go to https://account.live.com > Subscriptions/Services, find your Office product and download from there.
If it still doesn't work, download the updater https://support.microsoft.com/office/office-for-mac/troubleshoot-microsoft-autoupdate-in-microsoft-365-and-office-for-mac?apid=ets