Cannot open AAC "Critical error: Unable to establish a connection. No such host is known' (4317972)

After installing or upgrading Active Administrator, the user installs the Active Administrator Console (AAC) on another supported computer on the network. When opening AAC, the error below is displayed:

"Critical Error: Unable to establish a connection with the server. No such host is known" when installing the Active Administrator Console (AAC).

1. Domain firewalls are enabled
2. IPv6 is enabled as a dominant network protocol on the server where the Active Administrator Server Manager was installed
3. The DNS PTR record does not exist and NetBIOS is disabled on the AA Console computer

1. Disable Domain firewalls in the Windows Firewall control panel.  If this is not possible, open Control Panel | "Network and Sharing Center" | "Change advanced sharing setting" and "Turn on network discovery" and also "Turn on file and printer sharing".

2.  Disable IPv6 on the server where Active Administrator is installed.

If the console will still not connect, please try adding the FQDN, shortname and IP address of the AA server to the hosts file of the remote machine where the console is installed.