In our organization Windows server 2012 is installed. Domain is also configured. Some client computers after connecting to the domain does not appear in computers folder in active directory users & computers & also some of the discovered computers are pinging & some are not pinging. Firewall is turned off in all the computers .Even I disabled antivirus for testing purpose . but the problem is the same.
Please suggest what I have to do to discover the connected computers & some of the computers that has been discovered is not pinging .
All client computers OS is Windows 7 Professional.