Unable to launch applications externally through Netscaler Gateway, getting internal server IP address in ICA file

Unable to launch application externally through Netscaler Gateway and when checking further we see that we are getting internal server IP address in ICA file rather than "Gateway FQDN:443"...

The Connection to "App/Desktop Name" Failed With Status (There is no Citrix XenApp Server Configured on the Specified Address)

Users receive this error when trying to launch externally: "The connection to "App/Desktop Name" failed with status There is no Citrix XenApp server configured on the specified address.."...