Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Hello,
You don't have to add devices/computers specifically.
You invite the user you want to share with. You can use the instruction here: https://support.microsoft.com/en-us/office/share-your-microsoft-365-family-or-premium-subscription-b389b9ce-3ae3-4a82-9017-39d79972fcba
Once the sharing part is done, the user accept it and then install it directly.
Please go to https://www.office.com
Sign into their Microsoft account. Click on Apps on the left.
Then on the upper right, click on "Install apps". This will now download the installer file. Once downloaded, click on the file to install. It will install the Desktop version of the apps.