If you are planning your next DirectAccess project with Windows Server 2012 just consider this KB2782560. This KB provide a fix for Windows Server 2012 (does not concern DirectAccess projects based on UAG 2010). This KB is required if you plan to configure the Unified remote Access Role for DirectAccess in a high availability scenario using Hardware-Load Balancing.

--> please see the rest on the blog : http://danstoncloud.com/blogs/simplebydesign/archive/2012/12/16/a-kb-to-know-for-your-next-directaccess-based-project-with-windows-server-2012.aspx