IG has been configured for AD authentication as per the below article. But how can you keep the universe up to date.
Release : 14.x
Component : CA IDENTITY SUITE (VIRTUAL APPLIANCE)
The CA Identity Governance (IG) client tools can be used to help build the IG Universe, but thereafter maintenance is managed through the IG User Interface. You can configure your connector to pull the AD (Active Directory) data in to IG at scheduled intervals.
Administration -> Universes -> Connectivity.