Realmd discovery and join problem

Hello,
I am trying to do discovery with realmd "realm discover --verbose ABC.LCL"
The problem is that our AD domain is very large we have over 200 Domain Controllers in different location.
When i run the realmd to do discovery it randomly picks domain controllers to perform discovery which it does not have access to due firewalls and remote locations.

Resolving: _ldap._tcp.abc.lcl
* Performing LDAP DSE lookup on: 164.15.199.11
* Performing LDAP DSE lookup on: 164.15.131.131
* Performing LDAP DSE lookup on: 10.12.8.15
! Discovery timed out after 15 seconds
abc.lcl
type: kerberos
realm-name: ABC.LCL
domain-name: abc.lcl
configured: no

in the resolv.conf we have local domain controllers defined.
Is there a way to force realmd to perform discovery and domain join on the specific local domain controllers?

Thank you.