Hi, I upgraded vCenter 4.1 to 5.1 update 1a over the weekend, which I might add was fun!! 
I got there in the end though. Today, I was messing with the Groups/Users in the web client and accidentaly deleted the Administrators Group from the SSO Users and Groups. when logged in as Admin@system-domain, I can create a new group but how do i give it the admin priveledges to be able to administer SSO. At the moment I have a domain account which is in the _Regular_Users_ and LSAAdministators group but if I log into the Web Client with that account, it won't let me administer SSO... it will let me administer vCenter cos it has the Administrators Role assigned to it. I don't want to just rely on the single Admin@system-domain account, I want to add another admin account.
Appreciate any help.
Thanks in advance
Chris