So this is how it works. A print driver that is installed on the client
gets installed on the TS "server" when one connects. If there is a problem
during the driver installation phase the printer will not show up in the TS
session. Check the system event log on the "server" for TerminalServer
event 1111. If you see this then you will need to install the driver on the
server first before connecting.
Also only USB and LPT printers are redirected. The TS team does not support
printers that attach to a network port or for multifunction devices that use
the DOT4 protocols.