How to Enable Multiple Concurrent User in Remote Desktop Windows 7

Links:

1. http://forum.sambapos.com/t/step-by-step-on-how-to-configure-multiple-concurrent-rdp-clients-to-run-sambapos-iphone-ipad-galaxy-tablet/769
2. http://www.nextofwindows.com/how-to-enable-multiple-concurrent-user-in-remote-desktop-windows-7/