vCenter 5.5 Appliance and AD authentication

hi guys

I just installed a new vCenter 5.5 Appliance latest version released few days ago (anyway I having the issue with both 5.5 version released so far).

the problem is I am adding the same values to the identity source as I have configured in other 4 vCenter 5.1. I make the AD default but I am not able to login using root or an AD user.

I add the Admin Group to permissions and when trying to login using a AD user I get bad user or password error, same happens with root. In vCenter 5.1 when a AD Identity Source is the default root is still able to login... so to get this back I have to set localos as default again

+

any idea why?

thanks a lot