Specify connection on launch for Microsoft Remote Desktop client I'd like to be able to connect to a specific remote desktop when I start Microsoft's RDT client.  I'm running the latest RDT 8.0.15 client on Yosemite.

How can I do that?
You can do this by launching from an .rdp file:
* Create the Desktop bookmark in the app
* Export the Desktop as an .rdp file to e.g. your Mac Desktop
* Double-click to start the app and connect to the Desktop.

AFAIK, there's no way to configure the app to launch a desktop at start.