
Hi James, once you redeem your Office from office.com/setup you should not need, and definitely use it to install Office. The Product Key is integrated with the Microsoft Account used to redeem Office. Thereafter, the Microsoft Account replaces the Product Key. So, unless this is the first time you are installing your Office (after two months!) you use the Microsoft Account used with the Product Key to redeem your Office here: https://account.microsoft.com/services to install your Office. You should see an install link for your Office. Please come back for any further clarification or assistance.