About the DNS in the Active Directory, there is no SRV record processing method

After we have created Active Directory with DCPROMO, after installing Active Directory on a server running the Microsoft DNS service, you can use the DNS Manager Microsoft Management Console (MMC) snap-in to verify that it is The appropriate zone and resource records are created for each DNS zone. Active Directory creates its SRV records under the following folder:
_msdcs/dc/_sites/default-first-site-name/_tcp
_msdcs/dc/_tcp

At the above location, display The SRV record for the following services:
_kerberos
_ldap

If we lose the above information, what should we do?
1. Configure the DNS server to use a static Internet Protocol (IP) address.
2. Create a forward search area named after Active Directory.
3. Support your domain area for dynamic updates.

If you have tried the above method, you use NETDIAG /FIX command to verify that all SRV records NetLogon.dns file are all registered on the primary DNS server