I have an active directory integrated DNS zone.
The domain is running 2003 native mode. All DNS servers are 2003 R2.

Facts:
- Scavenging is disabled on the zone and on the various DNS servers
hosting the zone.
- We are preparing the zone to begin scavenging, and I have noticed
some inconsistencies.
- Several of our servers have very old timestamps on their records.
(> 1 year)
- All of our servers are assigned their IP addresses via Windows 2003
DHCP using static reservations
- Our DHCP server is NOT configured to do dynamic DNS Updates.

Based on the following Microsoft KB, Windows XP and Windows Server
2003 reregister their A and PTR resource records every 24 hours
regardless of the computer's role.
http://support.microsoft.com/kb/816592

Also, if I log on to one of these servers and run ipconfig /
registerdns, the timestamp will update on one DNS server, but that new
timestamp will not replicate.
So what I am stuck with is an updated timestamp on one DNS server but
a stale one on others.

My questions are below:
1. Why are my timestamps not updating on my servers' DNS records?
2. Why are the timestamps not replicating after they are manually
updated?
3. Does AD restrict timestamp updates and replication of timestamps if
scavenging is disabled?

Thanks.