Activate Office 2016 Mac Without Product Key -

There are command-line scripts often shared on platforms like GitHub (a famous historical example being the "microsoft-office-2016-volume-licenseer" scripts).

If you don't have a license, consider free alternatives like Office Online for basic tasks, or software like LibreOffice which is open-source and requires no key. Activate Office for Mac - Microsoft Support activate office 2016 mac without product key

Since Office 2016 is no longer supported (no security updates after October 2020), it's risky to use even with a valid license. Your best options: There are command-line scripts often shared on platforms