I have been working with DC for a few weeks now and as I poke around more and more I learn newer and better things as I go. I'm trying to clean up my companies inventory/SoM computers that have not had contact with the DC agent for quite some time. However some of them have a last contact time as the same day that I am looking at that PC on the SoM computers list. Can anyone point me in the right direction as to how to go about to check and see if these agents are trying to contact the DC distribution server properly? Or if they're maybe just PC's that my company doesn't even use anymore and no one removed them from the system properly. Some of the agent versions are varied as well. The two versions I've noticed are  9.2.080.W and  10.0.43.W. I don't know if this has anything to do with the fact that some of these haven't been in contact with the server for so long but I felt it was worth mentioning. Any and all help would be appreciated. Thank you in advance!