Welcome to our new Microsoft Q&A Platform.
Hi,
In order to make use of the right-click inside an open session you have three options:
- 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.
Quote from section “Monitors, audio, and mouse” in below link:
https://learn.microsoft.com/en-us/windows-server/remote/remote-desktop-services/clients/remote-desktop-client-faq#monitors-audio-and-mouse