Question : Lost msdcs records on DNS server

We have a Windows 2003 Active Directory Domain with a primary AD (Server1) controller and 2 backup (BDC1 and BDC2) controllers.  We recently demoted the primary controller (Server1)and made one of the other controllers (BDC1) the primary.  Prior to demotion, I moved the Global Catalog designation from the original primary to the new primary.  I also insured that SRV records were added to DNS for the new primary server.  Prior to this, the only server listed with a SRV record in the _msdcs forward lookup zone was the orginal PDC (Server1).  DNS was running on all 3 servers.  AD was replicated to all 3 servers and replications were successful.
I demoted server1 and restarted it and left it a member of the domain.  I checked replications and DNS and everything was working OK.  After the demotion I stopped the DNS, WINS, and DHCP services on Server1 but did not perform a restart.  Approximately 1week after the demotion I restarted Server1 in an effort to uninstall and reinstall Symantec Corporate Antivirus ver 8.1.  Since this restart, I can no longer see any of the SRV records or _msdcs records in DNS.  All items related to this information is missing, ie. _msdcs, _sites, _tcp, _udp, DomainDnsZones, Default-First-Name-Sites, and Forest DNS zones.  We can no longer add new machines to the domain and Mac clients which are bound to the domain are not authenticating to the domain.

I am looking for any suggestions that will allow me to rebuild this information in DNS.  We have already tried to restore the Veritas backup of the AD (System State etc.) from the day prior to the restart.  We do have a backup of the original however it is nearly 2 months old and the main reason we demoted Server1 was that it was an older server and it was running low on drive space.

Thank you in advance.

Answer : Lost msdcs records on DNS server

Restart netlogon service on Server2 and Server3. If your DNS is configured to support dynamic updates, proper SRV records will be created. To ensure that boths servers have correct A (host) record, run "ipconfig /registerdns" on both servers.

HTH

Toni