My network has three DNS servers and I am discovering that duplicate IP addresses are showing up in my DNS zones. Aging and Scavenging are presently not enabled on those servers and I should probably enable them but I have heard they can cause network problems if enabled incorrectly. Can anyone give me guidelines or procedures to correctly enable Aging and Scavenging on all of my DNS servers (I am under the understanding that it should be enabled on all servers). I would like to do this but I do not want to shut down my network or Active Directory. Thanks!