About 3 years ago, I changed my Active Directory domain name from 'old.local' to 'new.com'. As far as I can tell, I did everything at the time to make sure DNS and the whole AD infrastructure reflected this change. As far as I recall, dcdiag brought up everything as ok.
I've had some recent issues, potentially with AD, and this has caused me to run dcdiag again. The result is:
"Dynamic registration or deletion of one or more DNS records associated with DNS domain 'old.local.' failed. These records are used by other computers to locate this server as a domain controller (if the specified domain is an Active Directory domain) or as an LDAP server (if the specified domain is an application partition)."
"The dynamic registration of the DNS record '_ldap._tcp.gc._msdcs.old.local.' 600 IN SRV 0 100 3268 DC1.new.com.' failed on the following DNS server"
I've tried various things, including deleting the file C:\Windows\System32\config\netlogon.dns (which was full of entries for the old domain, merged in with the new). I then ran a fresh ipconfig /registerdns, followed by restarting the netlogon service. A few mins later, the new netlogon.dns file is regenerated, but with all the same incorrect entries.
I've also gone through all AD tools I can think of to check there isn't lingering entries for the fold domain, including AD Domains & Trusts, AD Sites and Services, ADSI Edit and LDP.exe. Nothing flags up as troublesome :-(
Any thoughts on where else to look, or what else to do is much appreciated!