Thanks, Pete. I thought of this one too, only this will only return if the user has a Cache account. I need to find users that may only have SQL access also. For example:

d ##class(Security.Users).Export("UsersExport.xml",0,"SupportCenter","*",1,)  --> returns an empty XML file. The user "SupportCenter" doesn't have a Cache user account. Now, if I run it again with a user that has a Cache user account, I get the appropriate information.