The (RemoteFX) printer looks OK but at the first print attempt it goes in error state.
Checking the Event log "TerminalServices-Printers" I read "Driver LabelWriter 450 required for printer LabelWriter 450 is unknown." This is logged at the session opening.
On the printer side the printer and driver are named "Dymo LabelWriter 450" (mind the "Dymo" word) and seems OK. I can edit the preferences etc...
Any hints ?
Please note that when I remote to a Windows 10 (1809), the (RemoteFX) printer works well. Means that the RemoteFX channel works well at the client side.
I tried (again)
the regular RDP high level redirection without success. "printer in error state". That time I find nothing in the logs. Morevover , the high level redirection is not working in W10 either.