According to the Citrix Printing Quick Start Guide1, Citrix recommends that you disable Direct connections to print servers if your Worker VMs and print servers are not in the same LAN. This is because in this situation the print job sent direct to the print server is not compressed. When the print job is routed via ICA it is compressed. This setting can be configured via Citrix policy under Printing > Client Printers > Direct connections to print servers2. Disabling this setting will allow users to print to both print servers via the ICA protocol. The other options are not relevant to the issue or the scenario.