Preventing Remote Desktop Resource Sharing in Fortigate

Hi,

I have a requirement to allow users to use Remote Desktop to connect through a Fortigate firewall to computers in a secured zone.  Additionally, there is a separate, defined file-sharing process to pull files from a common file share into this same secured zone.  The concern with Remote Desktop is that you can use Hard Drive Resource Sharing to circumvent the defined file-sharing process.

Of course, you can restrict Hard Drive Resource Sharing by GPO, but is there a method of achieving this

solely in a Fortigate (FG200D, FortiOS v5.4.6)?

Thanks for your time.

Lar