It took me a bit (and a lot of searching) but I finally figured out what was causing the problem. Turns out a large number or old XP machines in the District at one point was a test run for SCCM 2007, when trying to install the new client a registry setting was not being modified and prevented the installation to point the client to the right site code. The registry key I needed to remove was; HKLM\SOFTWARE\Microsoft\SMS\MobileClient\GPRequestedSiteAssignmentCode I pushed the client after scripting and deploying the reg change, now I see and manage the clients http://social.technet.microsoft.com/Forums/sl-SI/configmanagerdeployment/thread/9cdb0bcd-4cb6-48ff-9b34-c33daa7e2e2d