How do you install it if it is not bought for the admin himself but for another person, e.g. for grandmother's PC? When I redeem the product key in my Microsoft account, it is tied to my account and Microsoft does not feel able to transfer the licence to another account. Grandma can't reinstall Office without my Microsoft account. And under Account it says "this Office belongs to xyz" (your grandson). In other words, how do service providers install this product without tying it to an MS account in advance?