How to enable Dual Monitor Support for RDP Bookmarks on SMA 100 series appliances
Please follow these steps to enable Dual Monitor support on RDP bookmarks:
1. Please edit the RDP bookmark which has been created.

2. Please click on Show advanced Windows options.

3. From RDP6 Options, Click on Dual monitors.
4. Accept the changes and the changes will be saved.
NOTE: Dual monitors option works only Native Mode only. So set the bookmark type to Native.