Hi,
Could you please confirm how did users remoting from problematic computers? Are they remoting from mstsc or Rdweb?
To enable Printer redirection in RDP, you should first allow printer redirection via GPO in target server.
Computer Configuration-->Policies-->Administrative Templates--> Windows Components -->Remote Desktop Services--> Remote Desktop Session Host -->Printer Redirection
Do not allow client printer redirection-- Disabled or not configure
After then, when remoting from mstsc, go to local resource and check printers under Local devices
Hope this helps and please help to accept as Answer if the response is useful.
Thanks,
Jenny