If moving Office 2021 to a new computer, you must first deactivate it on the old one. Open an Office app (Word) > File > Account > Change License > Deactivate. Then use the recovered key on the new PC.
The free version of Magical Jelly Bean KeyFinder can retrieve Office 2021 keys. The paid version adds the ability to recover keys from unbootable hard drives. ms office key finder 2021
In 2021, a product key finder was a specialized utility designed to scan the Windows Registry or system files to retrieve the 25-character alphanumeric code used to activate Microsoft Office. These tools were essential because, while Windows stores the key to verify the license, it typically encrypts or hides it from the standard user interface to prevent unauthorized duplication. Why Users Needed Them If moving Office 2021 to a new computer,
wmic path softwarelicensingservice get OA3xOriginalProductKey The free version of Magical Jelly Bean KeyFinder
If you already ran an untrusted key-finder — remediation steps