I have a Domain Controller which is also a DNS server for my domain. My clients are connected to DC with DHCP server which is on another Domain (DHCP Server). I have configured Reverse Lookup Zone for my Domain. But the clients with DHCP IPs are not making entries to reverse zone even after ipconfig /flushdns ipconfig /registerdns. I have checked the settings on DHCP server and DNS server. Both have the setting of Dynamic updates enabled. Also to add the clients with Static IP when done ipconfig /flushdns ipconfig /registerdns make their entries in Reverse Lookup Zone. Why my Cleints on DHCP not making Entries Reverse Lookup zone?