Even if DirectAccess is now much more easier to deploy with Windows Server 2012, there still have some “cases” where Microsoft help is required. Jason Jones (Former Forefront MVP) updated his “Hot list” recently. Keep a bookmark on this list. This can save a lot of time during your next DirectAccess deployment

--> Please see the rest on the blog : http://danstoncloud.com/blogs/simplebydesign/archive/2013/04/04/a-kb-list-to-keep-in-mind-for-your-directaccess-projects.aspx