Use nslookup to find the IP addresses of the domain controllers

You can use Nslookup is a command-line tool that displays information you can use to diagnose Domain Name System (DNS) infrastructure.

1. Click Start, and then click Run.
2. In the Open box, type cmd.
3. Type nslookup, and then press ENTER.
4. Type set type=all, and then press ENTER.
5. Type _ldap._tcp.dc._msdcs.