The use of Name Protection in the Windows Server® 2008 R2 operating system prevents name squatting by non-Windows-based computers.
.================================================================= There are some misconceptions prompting fears that Scavenging will remove everything in your zone, includind servers.
Please understand, the main thing that scavenging works on is the timestamp.
If there is no timestamp, such as a manually created, static record, it will not get scavenged.
Also, if all servers, including DCs, are automatically updating their own record, then there is no fear of losing their records, because for one, their records (timestamps) are current, therefore scavenging won’t touch them, and two, Windows Servers by default will update their records every 24 hours, with the exception of domain controllers at every 60 minutes.
This is because DHCP doesn’t own the record, the client does, even though DHCP registered it.