Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Hello, thank you for reaching out to Microsoft Q&A.
Have you already redeemed the Product key on your Microsoft account?
https://account.microsoft.com/services
If you haven't redeemed your product key yet, open an InPrivate/incognito window in your browser and use the link below:
https://setup.office.com/redeem/enter-key
- Select Get Started, then enter your 25-character product key.
- Make sure you sign in with the Microsoft account you want this product to be associated with.
- Once redeemed, you should see your license under your Microsoft account here - https://account.microsoft.com/services
To activate it on your device, remove all previous Office apps. (Finder > Applications > Move Office apps to Trash)
Then, download it from your Microsoft account and sign in to Office apps.
If you are asked to buy an Office 365 Subscription, use the Office License Removal Tool to remove all the previous traces of the Office license and then reactivate it.
How to remove Office license files on a Mac
Let me know if you still need more help.