Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Have you successfully installed and activated Office on your new computer? Installation should be straightforward; just use the Install link next to your product at https://account.microsoft.com/services .
If you have a one-time purchase product, you may need assistance with (re-)activation. See https://support.microsoft.com/en-us/windows/activation/activate-microsoft-perpetual-products-using-the-product-activation-portal .