The Remote Desktop Client redirects the local printers by default. This is done so the user can send a print job from the Remote Desktop Server or Terminal Services Server to a printer connected to their PC. When the user logs in, the default printer is automatically changed so the user’s redirected printer is now the default.
In certain instances, you may want not want the redirected printer as the default. To change this behavior, enable the Group Policy “Do not set default client printer to be default printer in a session” under Computer Configuration – Policies – Administrative Templates – Windows Components – Terminal Services – Terminal Server – Printer Redirection.