Searching through the forums (and according to KB2484290) it appears that there is no solution to this problem. We are rolling out thin clients that are using dual monitors exclusively and we were very surprised to find out that we couldn't shadow sessions with dual monitors (which to us means that we can't shadow ANY sessions). This now completely changes our approach to managing these devices.
We are running Windows Server 2008 R2 SP1 with Remote Desktop Services installed. The thin clients are running Windows Embedded Standard 7 with the latest updates / RDP client. All steps have been followed to ensure that the apropriate settings and permissions have been set up to allow access into the session. We tested by unchecking the RDP setting “use all my monitors for the remote session”, with that setting disabled shadowing worked
Questions:
1. KB2484290 is from Dec 2010 - It's now April 2012, is there a workaround / hotfix for this issue that will allow us to shadow sessions using the native Microsoft tools?
2. Are there any recommended alternatives (software)? Free/Paid - doesn't matter we just need something that will work. I'm sure there are a few options out there but I am looking for suggestions for what people have used in the past that worked best for them to help us narrow down the choices.