Request the license key for office tab.

Hello,
For retrieving the license informaiton, please try to contact sales@extendoffice.com with your order information.
Thanks in advance.

If you still want to view your product key, here's how:
Go to the Microsoft account, Services & subscriptions page and sign in, if prompted.
Select View product key. Note that this product key won't match the product key shown on an Office product key card or in the Microsoft Store for the same purchase. This is normal.