Every now and then, I get PCs in the Forward Lookup Zone with duplicate IPs. The DC has the DNS role and the DHCP role. When DHCP assigns an IP to a PC, I don't think it is always deleting the record of the previous PC that had that IP. I think DHCP is set up correctly. I have it set to "Dynamically update DNS A and PTR records only if requested by the DHCP clients" and "Discard A and PTR records when lease is deleted". Does anyone know how to fix this? Thanks!