Firstly , definitely sort out your AD Sites properly first if you can at all . AD Sites are just like DNS in that you can think everything ' s set ok , and you ' re just getting a few odd , unrelated problems that strangely pop up every now and then but they ' ll just keep coming back until you get the foundations sorted out . Secondly , there ' s not much to creating a collection based on an AD Site and an OU , and there ' s nothing that special about a Limiting collection , they ' re really just query collections that you point at and say , You ' re a limiting collection now . Here ' s a Site and OU based collection query that I ' ve got set up select SMSRSYSTEM . ResourceID , SMSRSYSTEM . ResourceType , SMSRSYSTEM . Name , SMSRSYSTEM . SMSUniqueIdentifier , SMSRSYSTEM . ResourceDomainORWorkgroup , SMSRSYSTEM . Client from SMSRSystem where SMSRSystem . ADSiteName NewYork and SMSRSystem . SystemOUName COMPANY . COMWINDOWS 10 WINDOWS 10 LAPTOPS