The SRV record is a DNS resource record that is used to identify computers that host specific services, and is how domain controllers are located.
You can use DNS Manager on a domain controller that hosts DNS to verify that the appropriate zones and resource records are created for each DNS zone. Active Directory creates its' SRV records in the following folders:
<Domain_Name>/Forward Lookup Zones/_msdcs
<Domain_Name>/dc/_sites/Default-First-Site-Name/_tcp
<Domain_Name>/Forward Lookup Zones/_msdcs
<Domain_Name>/dc/_tcp
In the above locations, a SRV record should exist for the _kerberos and _ldap services.
NOTE: For a non-Microsoft DNS server, open the %SystemRoot%\System32\Config\Netlogon.dns file in Notepad and verify that the first record is _ldap._tcp.<Domain_Name>
You can use the Nslookup tool:
1. On your DNS server, open a CMD prompt.
2. Type nslookup and press Enter.
3. Type set type=all and press Enter.
4. Type _ldap._tcp.dc._msdcs.<Domain_Name> and press Enter.
Nslookup returns one or more SRV records like:
Server: jsi001.jsiinc.com Address: 192.168.0.1 _ldap._tcp.dc._msdcs.jsiinc.com SRV service location: priority = 0 weight = 100 port = 389 svr hostname = jsi001.jsiinc.com jsi001.jsiinc.com internet address = 192.168.0.1NOTE: If you have multiple network adapters, make sure that an internal adapter is first in the Binding Order.