Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Hi, You cannot use the Product Key more than once to install the retail version of Office Home and Student 2019. You reinstall Office 2019 from your Office Account at: https://account.microsoft.com/services/ You the same Microsoft Account that you used to setup Office for the first time. NOTE: This will not work if you purchased a illegitimate Pro Plus version online.