We switch from `External` hyper V to `Internal V` and after that we restart network in Visual machine.
MS throws error `Not a valid IP configuration`.
This happened because I use DHCP. However, Internal V does not have DHCP server.
Solution is fix IP in the Visual to be the same way like hyper-v IP in the real machine.
We could not remote desktop to the Visual machine if we use `External` hyper-v network, and have our lan cable unplugged.
If we don’t use lan cable, we have to use `Internal` hyper-v network, and fix IP correctly.