Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
For general information on activation, see https://support.microsoft.com/en-us/office/activate-office-5bd38f38-db92-448b-a982-ad170b1e187e.
If you are seeing an error message, go to https://support.microsoft.com/en-us/office/unlicensed-product-and-activation-errors-in-office-0d23d3c0-c19c-4b2f-9845-5344fedc4380.