Product Key activation on Microsoft store
In order to activate your product on Microsoft store, you will need to be logged in.
Once you have successfully logged in. On the top right you will find your avatar - click on it and select “Redeem code
Then enter your key and continue to redeem it on your account.
If you choose to redeem your key directly through your Xbox console then login to your account.
Go to the Store and select “Use a code”
Then enter your key and follow the steps to activate it on your account.