How to configure a custom rdp port for rdp relay (MyAccess)

How to configure an alternate, custom RDP port for RDP Relay through MyAccess

Microsoft Windows RDP Port has been configured to something other than the default 3389 tcp port

Unable to access windows run host server via rdp relay when rdp is listening on a custom port

PAM 3.6+ officially supports this capability:

Please refer to Section 1.6, Support for Custom RDP Port through PAM RDP Relay Functionality.