Thank you Puneet! I didn't see that documented anywhere, but it worked.

reswaran, Can I assume you've got this working in vSphere Web Client 6.0? After registering the UCS plugin successfully and restarting services on vSphere Web Client, I log back in and get faced with an error that it was unable to load a resource mod...

I have the same issue...  I can not remove a rack mount server that was disconnected from the environment.  It was connected VIA a Fex, the FEX is not showing up, but the rack mount C230 is still present (and of course all the errors).   It is diffic...