Some were suspicious of the hockeyapp site, despite the author being 'Microsoft Remote Desktop'. You can simply set this checkbox in the Preferences / General section: You can also add custom mappings by navigating to the Resources/Keyboard directory within the application contents, and opening the ClipboardActionTransformations.xml file in a plain text editor. (Note: Clipboard redirection will be available in a later update.)

Microsoft Remote Desktop beta adds support for Cmd+ X/ C/ V as well as Ctrl+ X/ C/ V to cut/copy/paste within a remote session.