This website uses cookies to improve your experience. Microsoft and Microsoft logo's are trademarks of Microsoft Corporation. Use 'BH93RF24' to get a discount when ordering! Tool Tips! Books Outlook Step by Step by Microsoft. Share on Facebook Share on Twitter Share by e-mail. This application does a bit more thorough scan of your computer for which it generates a report that also includes license keys for several of your installed applications. Simply install and run the application to find out the Product Key note: during the installation, there will be a prompt to also install a sponsored application which you can choose not to install.Īnother free application which you can use is Belarc Advisor. Changing the Product Key for Office or previous requires you to go into the Registry. Here, locate your Office application and press Modify or Change. Product Keys for Click-to-Run based installations of Office can only be modified via the command line. Office offers a scripted method to lookup your Product Key. Office and later include a vbs-script which will reveal the last 5 characters of your Product Key. The same applies to Office and Office licenses that are linked to your Microsoft Account. However, for either version there is no need to completely reinstall Office. The proper method to determine or change the Product Key depends on your version of Office or Outlook.