Hi isaacho,
SMP Console -> Settings\Notification Server\Domain Membership/WINS Import
Configure a discovery using the workgroup name, and check the Domain Browse List. This uses the network browse list to discover all computers on the domain. It is designed for small, peer-to-peer environments. This option does not work if the computers aren't in the browse list or aren't registered as sharing files or printers on the domain.
Could you please try the method? Please let us know if you need more details or if the your computers aren´t discovered.
Another way is using the Network Discovery.
Regards,