This guide explains the process for upgrading Active Directory domains to Windows Server 2008 and Windows Server 2008 R2, how to upgrade the operating system of domain controllers, and how to add domain controllers that run Windows Server 2008 or Windows Server 2008 R2 to an existing domain.
Upgrading your network operating system requires minimal network configuration and typically has a low impact on user operations. The upgrade process is straightforward, efficient, and allows your organization to take advantage of the improved security that is offered by the Windows Server 2008 and Windows Server 2008 R2 operating systems. This guide covers the process for upgrading domains and domain controllers, and how to add new domain controllers to existing Active Directory domains. It includes details about how to run Adprep.exe and resolve known issues and errors if they arise.