Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
1
Log into this web page to enter your product key to check if the subscription can be activated:
https://setup.office.com/Home?wa=wsignin1.0
2
If that is not successful, log into this web page to enter your product key to check if the subscription can be activated:
https://account.microsoft.com/billing/redeem
3
If you do not see an error indicating a problem with the product key, or a 'Server unavailable' error, just an indication to try again later, you will need to contact Microsoft Support directly, try using this method to contact their support.
Go to this link: https://support.microsoft.com/contactus
Select Microsoft 365
Click 'Get Home Support'.
In the box provided, type billing.
Press Enter, then on the next page, scroll down and click 'Sign in to Contact Support'.
Navigate to Microsoft 365 and Office - Manage my Subscription.
Select the 'Chat with support agent in web browser' option