In addition to the Post I just made on the Group Policy webcast series, my team also did a series on Active Directory (based on Windows Server 2003).  Just like Group Policies, there is a lot from the below series on AD that is also applicable for WS2008.

On-Demand Webcasts

TechNet Webcast: Active Directory Inside Out (Part 01 of 11)—Active Directory Logical Concepts—Level 200

TechNet Webcast: Active Directory Inside Out (Part 02 of 11)—Active Directory Physical Concepts—Level 200

TechNet Webcast: Active Directory Inside Out (Part 03 of 11)—Active Directory Replication and the Operations Masters Role—Level 200

TechNet Webcast: Active Directory Inside Out (Part 04 of 11)—Installing and Managing DNS—Level 200

TechNet Webcast: Active Directory Inside Out (Part 05 of 11)—DNS Features and Configuration—Level 200

TechNet Webcast: Active Directory Inside Out (Part 06 of 11)—Interoperability and Migration from Novell Directory Services—Level 200

TechNet Webcast: Active Directory Inside Out (Part 07 of 11)—Migrating File Resources from NetWare to Active Directory 2003—Level 200

TechNet Webcast: Active Directory Inside Out (Part 08 of 11)—Deployment and Interoperability with NT 4.0 and Windows 2000—Level 200

TechNet Webcast: Active Directory Inside Out (Part 09 of 11)—Administration Features—Level 200

TechNet Webcast: Active Directory Inside Out (Part 10 of 11)—Replication Features and Forest to Forest Trusts—Level 200

TechNet Webcast: Active Directory Inside Out (Part 11 of 11)—Group Policy Management Console and Software Restriction—Level 200

Harold Wong
harold.wong@microsoft.com