This step-by-step article describes how to set up and use the ForestPrep tool, which prepares the Active Directory forest.
When you use the /ForestPrep option, the Setup program extends the Active Directory schema to add Exchange-specific classes and attributes. ForestPrep also creates the container object for the Exchange 2000 organization or the Exchange 2003 organization in Active Directory, and it assigns, to the account that you specify, Exchange Full Administrative permissions to the organization object. This account then has the authority to install and manage Exchange 2000 or Exchange 2003 throughout the forest, along with the authority to assign further administrators Exchange Full Administrative permissions after the first server is installed.
Click Start, click Run, and in the Run box, type E:\Setup\i386\SETUP.EXE / ?, where E is the letter of your CD-ROM or DVD-ROM drive.
Click OK to display the Microsoft Exchange - Usage dialog box, which informs you about all the available Setup options.Examine the individual command-line options, noting /ForestPrep.
Click Start again, click Run, and in the Run box, type E:\Setup\i386\SETUP.EXE /ForestPrep, and then click OK.
In the Welcome screen that appears, click Next.
In the End-User License Agreement screen, accept the licensing agreement by clicking I Agree, and then click Next.
In the Product Identification screen, enter the product key of your Exchange 2000 Server installation CD or your Exchange Server 2003 installation CD, and then click Next.
In the Component Selection screen, under Action for Microsoft Exchange 2000, make sure that ForestPrep is selected, and then click Next.
In the Installation Type screen, make sure that Create a New Exchange Organization is selected, and then click Next.
In the Organization Name screen, under Organization Name, type the name of your organization and the name of the administrator account or group that is responsible for installing Exchange 2000 or Exchange 2003, and then click Next.
In the Component Summary screen, verify the schema update, and then click OK to start the processing.