Because domain controllers contain essential Active Directory information, ensure that the domain controllers in your organization are well protected from possible failures. The following provides the following information about domain controllers:

• Domain controller roles
• Running Exchange 2000 on a domain controller
• Domain controller redundancy

The information in this article applies to:

• Microsoft Exchange Server 2003 Enterprise Edition
• Microsoft Exchange Server 2003 Standard Edition
• Microsoft Windows Small Business Server 2003, Premium Edition
• Microsoft Windows Small Business Server 2003, Standard Edition
• Microsoft Exchange 2000 Server