If you notice under File -> Office Account -> User Information that the local domain user account is listed instead of the Microsoft 365 account, you'll need to switch accounts. Usually, during product activation, the Microsoft 365 account should be selected automatically, but sometimes it gets stuck on the local domain user account for some reason. Here's a quick fix:
Go to 'File' in your Office application.
Click on 'Office Account'.
Under 'User Information', if you see the local user account, choose 'Switch Account'.
Select or sign in with the Microsoft 365 account that should be associated with the product.
This is crucial because your Microsoft 365 subscription, along with all its features and syncing capabilities, is tied to the right account being active. If switching accounts doesn't do the trick, try signing out of all accounts in the Office suite and then log back in with your Microsoft 365 account.
Also, once you switch the account, check the activation status to make sure your Office products are properly activated with your Microsoft 365 account. This issue might pop up again, especially after updates, so keep these steps in mind for future reference.
Hope this helps!
