Open the Command Prompt as administrator.Method 2: Change Office 2019 / 2016 Product Key with Command Prompt You’ll be prompted to sign in to your Microsoft account which is linked with your new Office product key, or enter the product key instead.If you’re using Office 2016, click on the Change Product Key link instead. On the right side, click on the Change License button under the Office logo. Open your Word or Excel application included in your Office 2019 / 2016 suite.Method 1: Change Office 2019 / 2016 Product Key from Office Application Your Office license has expired and need to replace it with a new product key? Need to change Office product key because it’s already activated by the maximum number of times? In this tutorial we’ll show you 2 easy ways to change Office 2019 / 2016 product key without re-installing.
