I've been developing/testing a vbscript which we intend to add as a login script that will automatically create an Outlook profile verses our Exchange server if the user does not have one on the pc they are using at the time.  I thought I had everything tested to the limit (on the desktop pc's) until I tested it out on a Windows terminal server (users have VPN access to a TS) - the script which runs perfectly on a desktop pc does absolutly nothing when run on a terminal server.

To keep things simple I've just cut things down to a simple WMI query (see below) and even this basic query refuses to echo out the user name.  Every time the script is run the below error appears in the framework.log.

Can anyone explain this behavour  (is there a difference between a "normal" session and a terminal services session when querying WMI objects)?

From framework.log:-
Shell Name Explorer.exe in Registry not found in process list.      05/05/2008 21:45:11.949      thread:4820      [d:\srvrtm\admin\wmi\wbem\providers\win32provider\common\implogonuser.cpp.163]
Unable to locate Shell Process, Impersonation failed.      05/05/2008 21:45:11.980      thread:4820      [d:\srvrtm\admin\wmi\wbem\providers\win32provider\common\implogonuser.cpp.175]

Simple WMI query:-
strComputer = "."

Set objWMIService = GetObject("winmgmts:" & "{impersonationLevel=impersonate}!\\" & strComputer & "\root\cimv2")
Set colComputer = objWMIService.ExecQuery ("Select * from Win32_ComputerSystem")
For Each objComputer in colComputer
strUserName = objComputer.UserName
Wscript.Echo strUserName
Next