We are migrating from ACS 3.3 to 5.1 - formerly we were able to configure ACS to use an external database for internal user passwords. Thus, in 3.3, we had AD users using a Windows database for their password and we were able to use our AD accounts to administer ACS.
In 5.1, when viewing the "Accounts" under the System Administration dropdown, there appears to be only the ability to create internal accounts and use internal passwords. This is yet another password mechanism to track, enforce, and audit - it would be preferable to have the option to use our AD accounts to get around this. I've looked through the User and Identity stores and don't see an obvious way of making this work, and there is no mention of it in the documentation.
Note that I am not talking about authenticating devices to Active Directory, this functions fine - I'm talking about the actual ACS system administrator / web authentication. Am I just missing the option?