Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Hello, thank you for reaching out to Microsoft Q&A.
To transfer your Retail Office 2016 or 2019 editions,
On your new PC, sign in with your Microsoft account here:
https://account.microsoft.com/services
Under the Products you’ve purchased section, download the Office apps and install them on your device. Once installed, sign in with the same Microsoft account that is associated with your Office license to activate it.
If you encounter activation errors, go to https://account.microsoft.com/devices (Devices section) and remove your old device from your Microsoft account.
Let me know if you still need more help.