Your PC can't connect to the remote PC because the Remote Desktop Gateway and the remote PC are unable to exchange policies. ...

Your PC can't connect to the remote PC because the Remote Desktop Gateway and the remote PC are unable to exchange policies. This could happen due to one of the following reasons:
    1. The remote PC is not capable of exchanging policies with the Remote Desktop Gateway.
    2. The remote PC's configuration does not permit a new connection.
    3. The connection between the Remote Desktop Gateway and the remote PC ended.

 
Contact your network administrator for assistance.