The easiest way is to look in usermanager for domains on the server,double click the user name, then click the profile button and see if there is an entry there. If not you can always look on a machine that the user has logged into and right click on my computer, go to properties, then select user profiles... it will state if it is roaming or not. Just remeber, to do it that way the computer has to have been logged into by the user.
Good Luck,
SteelDragon