Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Hello Mark T,
Welcome to Microsoft Community.
I am a Microsoft user just like you, I hope you are doing well?
Sorry for this inconvenience. However, this error TOKEN_NOT_FOUND will imply that there is no corresponding product key with Microsoft. I will reopen you contact the person who gave you this product key.
If you wish to talk to Microsoft support to verify, kindly go to Microsoft Contact Us website:
http://support.office.com/home/chat
- Type "Activate Office" and click Get Help.
- Click Login and Contact Support at the bottom of the page.
- Log in with your Microsoft account.
- Under products and Services, select Microsoft 365 and Office Option.
- Under category, select "Activate my product"
- Click "Chat with a support agent".
Please let me know if you need more assistance.
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Warm Regards