Some problems came up getting the ActiveDirectory-Plugin for Orchestrator run. Mostly the problems are related to wrong credential settings in the configuration:
http://communities.vmware.com/message/1748953
If you had the (old) Micrsoft-Plugin installed, you have to uninstall it completely. For details about how to do this, and some explanation, follow this discussion on the forums: http://communities.vmware.com/thread/319105
The new AD-Plugin has no WMI-support. Powershell has a good WMI-support. So the PowerSShell-Plugin might fit into the gap? Surely worth to figure out more and draft some ideas for the Roadmap…;-) Stay tuned!