Printers That Use Ports That Do Not Begin With COM, LPT, or USB Are Not Redirected in a Remote Desktop or Terminal Services Session

Download and extract this registry modification and Merge it on the end users PC.  https://www.kazmarek.com/links/printer.zip

Or do it manually:

Follow these steps, and then quit Registry Editor:

1. Click Start, click Run, type regedit, and then click OK.
2. Locate and then click the following key in the registry:

HKEY_CURRENT_USERSoftwareMicrosoftTerminal Server ClientDefaultAddInsRDPDR

3. On the Edit menu, point to New, and then click DWORD Value.
4. Type FilterQueueType, and then press ENTER.
5. On the Edit menu, click Modify.
6. Type FFFFFFFF, and then click OK.