If rdesktopce has issues to connect to a Remote Desktop Server keep in mind that is only supported up to Windows Server 2008. Depending on your settings and the installed or not installed updates, rdesktopce may not be able to connect. I cannot fix this!
If rdesktopce connects to a Windows 2008 R2 server and shows only a desktop with blue background, try the following setting in Remote Desktop Session Host configuration:
Change “Security Layer:” to “Negotiate”
The same setting prevents rdesktopce to connect to a Windows 2012 R2 Server! Currently no solution for this issue.