Computer not updating dns

I have configured the following on the dhcp server properties; In the dhcp console if I right click on IPV4 and select properties dns tab - 'Enable DNS Dynamic updates according to the settings below' is ticked - 'Always dynamically update DNS A and PTR records' is selected - 'Discard A and PTR records when lease is deleted' is ticked In the advanced tab credentials button: - I have entered in the credentials of a domain admin user account, this domain admin account is a member of the 'Dns Update Proxy' security group in active directory.

On the DHCP scope dns tab: - 'Enable DNS Dynamic updates according to the settings below' is ticked - 'Always dynamically update DNS A and PTR records' is selected - 'Discard A and PTR records when lease is deleted' is ticked On the DNS server I have configured a reverse lookup zone for the subnet which the DHCP scope issues ip addresses.

This DC (Server 2008) is issuing dhcp addresses for a completely different subnet. If I connect a computer and it receives a DHCP addresses, it may register in DNS.

dcdiag fails on 'NCSec Desc' it says: "error enterprise read only domain controllers doesn't have replicating directory changes access rights for the naming context." Not sure what this means really as this is not a RODC. If I delete the DNS entry and lease and do this again, it may not register the entry.

I have experimented with these settings using a short DHCP lease time of 5 minutes. But if I disconnect the computer within the 5 minutes, it certainly wont delete the record when the lease is deleted at the end of the 5 minutes.

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I have a feeling that your issue is either with your DNS setup, or your replication.On the client, if I open a command propmt and type 'ipconfig /registerdns' I now have a DNS entry within the forward zone.However, I do not have a entry in the reverse lookup zone.Can someone please help me troubleshoot why DHCP is not updating DNS correctly. Are you by any chance running DNS on multiple Domain Controllers? Each DC has DNS which is AD integrated and is a DHCP server.are is one domain controller acting as DHCP, and DNS? where I'm going at, is maybe it's a replication issue? One is a server 2003 and is issuing DHCP addresses for different subnets.

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