I have 4 sites. All computers are on the same domain. The three remote sites are connected via vpn to the main site and are in a different subnet.
main site ips 192.168.20.xx
remote a 192.168.10.xx
remote b 192.168.40.xx
remote c 192.168.60.xx
all on same domain.
when type net send /domain msg, only the computers in 192.168.20.xx subnet get the net send.
messenger service is enabled on the remote site pcs
i can type net send computername msg and the computer gets the net send