Hi,
I've configured AD authentication on my vCenter appliance.
I can login with user and password from AD on the web client manualy, but if i choose "Use Windows session authentication" i get this error:
The authentication server returned an unexpected error: ns0:RequestFailed: IDM threw unexpected error during authentication :: Native platform error [code: 9234][null][null]. The error may be caused by a malfunctioning identity source.
I can login to vSphere traditional client with windows session authentication without problems.
I've already tried the info on this KB: http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=2058235 but no luck 
Anyone knows how to fix this?