6425C ENU Companion
Active Directory Design Guide
02 active directory domain services
Module 1 Introduction to Managing Microsoft Windows Server 2008 Environment
Win Server 2008 Lesson 2 Designing an Active Directory Hierarchy
Microsoft Offical Course 20410C_02
Lesson 14: Creating and Managing Active Directory Users and Computers MOAC 70-410: Installing and Configuring Windows Server 2012.