Apple - How to emulate mouse right-click in Microsoft Remote Desktop?

Actually I use RDP from a Mac all the time to Windows servers. The right-click can be simulated with a two finger tap on a track pad. The same behaviour works from a magic mouse and magic track pad.

RDP isn't really configurable in any real way.
Your only option is to actually send it a right click. Windows doesn't have any ctrl/click alternative, even with direct access.

From Remote Desktop Client on Mac: FAQ

Alternative hardware input methods & activation details :-

• Standard PC two button USB mouse
• Apple Magic Mouse: To enable right-click, click System Preferences in the dock, click Mouse, and then enable Secondary click.
• Apple Magic Trackpad or MacBook Trackpad: To enable right-click, click System Preferences in the dock, click Mouse, and then enable Secondary click.