Your network contains a single Active Directory domain named contoso.com.
An administrator accidentally deletes the _msdsc.contoso.com zone. You recreate the
_msdsc.contoso.com zone.
You need to ensure that the _msdsc.contoso.com zone contains all of the required DNS
records.
What should you do on each domain controller?
A.
Restart the Netlogon service.
B.
Restart the DNS Server service.
C.
Run dcdiag.exe /fix.
D.
Run ipconfig.exe /registerdns.
Explanation:
Reference 1)
http://support.microsoft.com/kb/817470
To register the required records to the single root domain controller, restart the Net Logon
service on all the domain controllers. The replication works correctly if the replication window
is not less than the default DNS Time to Live (TTL) entry. To restart the Net Logon service,
follow these steps:
1. Click Start, click Run, type cmd in the Open box, and then press ENTER.
2. At the command prompt, type the following command, and then press ENTER: net stop
netlogon
3. Type net start netlogon, and then press ENTER.
Reference 2)
http://serverfault.com/questions/383915/how-do-i-manually-create-the-msdcs-dns-zone-fora-domain-that-wascreated-pre-s
Be sure to restart the Netlogon services on all DC’s when the zone has been replicated to
them. This forces the DC’s to register their SRV records in the _msdcs zone.