Constantly nagged by Office 2011 to reenter your product key every time you open Word, Excel, PowerPoint or Outlook? Tried various fixes such as repairing permissions or moving the Office 2011 app to the trash and back to the Applications folder and finding that none of those resolve the problem on a permanent basis? Below is another workaround tactic to consider.
The latest idea was brought to my attention when Excel 2011 greeted me with the following error message:
To rebuild the Office database, navigate to Applications > Microsoft Office 2011 > Office and open Microsoft Database Utility.