You can impersonate any Server user from Desktop directly, once you are logged into the Server via Desktop. I'm on a mobile and don't have a screenshot handy but there's an option to switch the logged in user from Desktop, and it exists so you can see what any user would see on the Server.
You may also want to dig into this:
Thanks for the info. I use the Desktop impersonation quite frequently, but I always want to make sure things look ok in Server as well. They should be the same, but we all know how that can go.
I think the Run as User might be a bit more in depth than I'm looking for at this time.
Would be nice if I could change the "Tableau" account to a test account or create my own Server side.