Pete Zerger (MOM MVP) and I collaborated on a guide about Active Directory integration in System Center Operations Manager 2007.

Operations Manager 2007 integration with Active Directory is designed to minimize cost and effort in Ops Mgr  agent administration, by allowing an administrator to publish agent configuration details in the Active Directory domain partition related to desired Operations Manager 2007 Management Group membership, as well as desired primary and failover management server settings.

Read the guide here