Apple Training Series Mac OS X Directory Services v10.5

Appendix B. Extending Your Active Directory Schema

If the majority of your users are already defined in an Active Directory node, you may decide to extend your Active Directory schema to provide support for attributes and object classes specifically for Apple objects.

Administrators have been reluctant to extend the Active Directory schema because it was impossible to reverse a change in versions of Windows Server prior to Windows Server 2003. If your Active Directory Domain Controllers are running Windows Server 2003 or later, however, this is no longer as much of an issue, because you can make schema changes inactive. Nevertheless, a change to the Active Directory schema affects all the Domain Controllers in your forest, and you should carefully ...