Question You may need to upgrade or migrate the existing CA structure in many scenarios, such as hardware change, host name change, CA type change, domain membership change, Windows version or edition change. How to plan and perform CA upgrade or migration? Answer To plan and perform CA upgrade and migration, please refer to the following TechNet links which describe in detail some common migration scenarios, identify what is supported and what is recommended, and provide step-by-step instructions for the most common tasks. They also offer general guidance on how to create an upgrade and migration plan for your environment. Planning the Upgrade or Migration http://technet.microsoft.com/en-us/library/cc742466(WS.10).aspx Performing the Upgrade or Migration http://technet.microsoft.com/en-us/library/cc742388(WS.10).aspx Performing the Post-Upgrade or Post-Migration Tasks http://technet.microsoft.com/en-us/library/cc742471(WS.10).aspx Applies to · Windows Server 2008 · Windows Server 2008 R2