Your answer is the error...CERT_E_UNTRUSTEDROOT...if you are using a self signed certificate the client must trust that certificate or else it can't connect.  Make sure that the client does not get any certificate errors by importing the certificate into the clients trusted root certificate store under the "Computer" certificate store and you should have no problems.
Hi all, Haunting some connections issues that are driving me crazy.  Setup:  Internet client (AppPortal)     |     |  Secure IT (3x NIC: 1x WAN, 1x DMZ, 1x LAN)    |                                       | Connection Broker                | (in DMZ)                           Parallels Virtuozzo VDIs   VDIs are ready, PNtools installed, etc. AppPortal gets it's configuration just fine. I'm trying to get RDP over SSL working (using a self signed cert). DMZ and LAN are RFC1918 address space.   Message from RDP client: CERT_E_UNTRUSTEDROOT (click) The computer can't connect to the remote computer (...)  Log files attached.  
Connection (SSL) issues