When using the native Remote Desktop clinet (mstsc.exe) from my workstation, it loads my preferences from the default.rdp file located in My Documents. I have modified this to include "smart sizing:i:1" so that I can scale the remote desktop window to whatever size I like while being able to see the entire contents of the remote session.
I have set up a number of Remote Desktop Gateway servers and often times find myself using the Remote Desktop tab to connect to machines behind the gateway, however, just like the Remote Desktop client, I cannot enable smart sizing from the web UI. I know that I can create an RDP file that uses the Gateway server and then modify it to include smart sizing, but I want to include this setting directly from the web site.
How can I modify the default settings of the rdweb remote desktop connection tab to include smart sizing or other customizations?