Hi,
Are you using MAK key to activate the Office?
The volume licensed versions of Office, such as Office LTSC 2024, are installed with a Generic Volume License Key (GVLK). This key enables Office to automatically discover and activate against your Key Management Service (KMS) host computer or Active Directory infrastructure.
Ensure that you are using a valid Multiple Activation Key (MAK) or Key Management Service (KMS) key. If you are using a MAK key, verify its validity. Check if there are any other Office products installed on your machine that might not have been removed completely. This can sometimes cause conflicts during activation.
Just checking in to see if the information was helpful. Please let us know if you would like further assistance.
If the response is helpful, please click "Accept Answer" and upvote it.
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.