you can hide “Connect to a remote PC” link to set ShowDesktops value to false from true.
(Open IIS -> Sites -> Default Web Site -> RDWeb -> Pages) and open Application Settings.
You can have trouble to connect on your web access after made this change (only on IE11, i didn’t have this bug on Chrome…). The connection is block on “Searching for available RemoteApp Programs” message.
Edit Site.xsl file from C:WindowsWebRDWebPages and find the line which contains :
More information about this there :