Unable to connect to MKS: Host address lookup for server

When the client pc where the viclient is installed can't resolve the dns name of the esx host you get the following when trying to open the console of a VM:

To resolve this issue you should ensure that the client can resolve the name of the ESX server (for example by using ping from the command line of the client pc).

Check that the client has similar dns settings as the virtual center server. It's also possible to manually edit the hosts file if the DNS host serving the ESX environment can't be used.

This dns requirement exists in version 3.0.2 and newer.