Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Dear Adriano,
Greetings! Thank you for posting in the Microsoft forum.
Office one-time license can’t be transferred from mac to Windows or vice-versa. Office for Windows and mac are sperate products and we can’t transfer Office between different Operating systems.
There’s, however, a workaround that you may consider, you can install Windows 10 on your Mac with Boot Camp Assistant
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Uninstall Office from the old computer, install it from your Microsoft account on the new computer and sign in to activate.
Download and install or reinstall Microsoft 365 or Office 2021 on a PC or Mac
If you need any help, let us know. We will look forward to your reply. Stay safe and stay healthy.
Sincerely,
Neha Singh | Microsoft Community Moderator