I manage an SMS server that is part of a corporate heirarchy. I was building some collecxtions recently based on subnet and noticed a number of users computers did not show up? I thought they had SMS set to do logon discovery, but if so why the missing machines? Is there a way I can force SMS to go out, query my network and add the systems that are not currently in SMS? Also, how woud people be possibly blocking SMS from installing / running on their systems?