Windows AD の信頼の種類について

Understanding Trust Types
http://technet.microsoft.com/en-us/library/cc730798.aspx

信頼の推移性とは

http://technet.microsoft.com/ja-jp/library/cc754612.aspx


双方向信頼
http://thesharepointfarm.com/2013/03/selective-authentication-can-kill-the-people-picker-in-a-two-way-trust/