Use Nslookup to verify the SRV records, follow these steps:
- Click Start, and then click Run.
- In the Open box, type cmd.
- Type nslookup, and then press ENTER.
- Type set type=all, and then press ENTER.
- Type _ldap._tcp.dc._msdcs.Domain_Name, where Domain_Name is the name of your domain, and then press ENTER.