Only use unambiguous accounts for printing over the Virtual Channel Gateway (i. e., not a guest account), and make sure that the desktop and the ThinPrint Servers are not in different domains.
On remote desktops
Virtual Channel Gateway can be installed on remote desktops (terminal servers or virtual desktops) using the Remote Desktop or Desktop Engine role of the ThinPrint Engine installer.
On virtual desktops
Note that there is a slight difference between the Virtual Channel Gateway for virtual desktops and that for terminal servers. With the terminal server’s version the addresses of print servers have to be set up.