I am working on two VMs, the domains are ArcticIce.com and GlacierIce.com
They have static IPs 192.168.100.1
and 192.168.100.2
DNS running on ArcticIce.com
I ran into this problem when trying to add a global group from GlacierIce.com to a universal group in ArcticIce.com. It is worth noting GlacierIce can ping ArcticIce, but not vice versa.
The host PC is running Windows 10, two VMs are Windows Server 2008. NICs from both VMs are set to NAT as default.