Hi @bye8bye
Please check the Office product license you purchased.
If you purchased the MAK key for volume licensed versions of Excel 2021, this key cannot activate other versions of Office apps.
Besides, according to "List of Product IDs that are supported by the Office Deployment Tool for Click-to-Run", the product ID is Excel2021Volume
.
If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
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.