On Remote Server –> Con­trol Panel | Admin­is­tra­tive Tools | Ter­mi­nal Ser­vices Con­fig­u­ra­tion.
Open the Con­nec­tions branch in the tree, double-click RDP-TCP and go to the Client Set­tings tab. Make sure Clip­board Map­ping is unchecked (it’s a “check to dis­able” setting).