While the "public network" option may seem like a good idea, it doesn't allow for specific subnet probing. It also did not pick up the other two subnets for remote sites which are connected via routed (VTI based) VPN tunnels with that option ticked. That's despite them being in Active Directory. Please include an option to add subnets to the probe's scope so that it will look on those networks as well as the home subnet.