The reports and alerts in Active Administrator are all based off information in the Security event logs on the DC. AA is not capable of performing enumeration style (collecting the current state of AD and its objects) reporting of AD objects.
We do have another product call Enterprise Reporter which is specifically designed to perform point in time data collection against AD and its objects as well as collect from Computers, NTFS data, SQL and Exchange information. You can then run any of the canned reports, which are customizable, or create or request custom reports to suit your needs.
You can find more information about Enterprise Reporter here: