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DHCP not updating AD DNS

Majicthise asked
Last Modified: 2014-08-07
I am having an issue with DNS.
It's worked for yonks and nothing has changed of late - except a power failure...

Site A server A is a 2008 PDC. It's doing DNS & DHCP, Server B is a 2008 BDC also running DHCP
Site B server C is a 2008 BDC doing DNS & DHCP

DNS is not being updated though.

I killed al leases last night and this morning no updates in DNS.
Clients on site A or B are getting leases from only the legitimate servers. I've checked
I then disabled DHCP on Server B just in case.
Machines join the LAN and get lease but still DNS not being updated.
AD appears to be working fine - I can add machines and they are duly replicated. DFS works

I've check security settings and the 3 DC's are allowed to update DNS.
I've also set DHCP to forefullyupdate DNS regardless if the client asks or not.

Also DNS timestamps.
If a user gets a lease yesterday say and then another elase today - say the same IP
Should the timestamp in DNS not be updated also? Some have beenupdated today
but others havent or are missing completely
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