Hmm… I don’t know if it’s even possible to redirect network shared printers through a standard Remote Desktop connection (let alone a RemoteApp session), as that’s not something that I’ve ever tried doing before. If I had to guess (based upon how finnicky printing over a standard Remote Desktop connection is), I’d say that it’s probably not possible. However, I’d need to do some additional research on that one in order to find out for sure though.

FYI, we’ve pretty much given up on redirecting printers nowadays since it can be such a hassle. Rather we now just use the redirected “Microsoft Print to PDF” printer to print all of our documents out to a PDF file, and then we go ahead and print the resulting PDF files from the local computer’s attached (or shared) printer instead. If you choose the “redirected” version of the above mentioned printer driver, it will automatically create the PDF file within the “Documents” folder of the local computer for you. It works really well for our needs (but, admittedly, your needs may be different).

I’m sorry that I don’t have a better answer for you on this one.