Hi Folks,
After upgrading our existing test vCenter server from 5.0 update 1 to 5.1, I'm trying to add in our AD domain as an identity source for SSO.
When I enter all of the details and click on the Test Connection button, all appears happy:

However, when I subsequently click on OK to add the identity source, the operation fails with the following response:

I have also attempted to add the identity source using a newly created account with domain admin rights, and the same password as the admin@System-Domain user, but with the same outcome.
Anybody else encountered this issue? Any ideas?
Cheers,
Chris [;-{)>