Moving Microsoft Office to a new computer depends on the license type. Microsoft 365 subscriptions usually transfer through your Microsoft account, while one-time licenses may have stricter rules.
Before you start
Find your product key or Microsoft account, uninstall from the old device if required, and install the same edition on the new device.
Activation
Sign in or enter your product key. If activation fails, check that the edition matches your purchase and contact support with the error message.