Good Morning.  I have an instance of ServiceDesk Plus in my primary VLAN that does a network scan of the VLAN it's on and two others.  These three VLANs are all on the same domain however.  There are rules in the firewall that allow the other two to talk to domain controllers for DNS, AD, etc.  These are scanning fine.

At our other location there are two more VLANs each on their own domain with their own domain controllers etc.  I'm trying to scan one of them and it brings back every IP address as an unknown workstation.  Even if it's a switch and even if that IP isn't in use.  The exception being any Windows machines that have the agent on it.  Has anyone else experienced this before?  I'm working with support on this matter but it is a slower process than I would like.