Is there anything a Windows domain administrator might need to do while configuring a workstation for a new user that absolutely can't be done without the user's domain account password? To avoid asking users for their passwords the admin could, theoretically, change the password, log in as the user, and do whatever it is they wanted to do, but would that actually give them any additional permissions that they don't already have by virtue of being a domain administrator?
The answers so far have referred to "tuning" or changing the user's profile. However, there's this article from Microsoft on modifying the default profile which gets applied to users when they log on for the first time and these instructions for changing another user's Windows registry settings at any time. What would an admin change while logged in as a user that the admin couldn't change using these or other available techniques that don't involving logging in as the user? Just "logging in as the user" isn't a reason to ask for or change the user's password. I'm looking for a practical reason for doing so.