You must ensure that each of the server roles meets the appropriate prerequisites and system requirements before you begin the modification or uninstall process. For more information about server roles, see Overview of Exchange 2010 Server Roles. To understand the prerequisites for all server roles, see Exchange 2010 Prerequisites. For more information about system requirements, see Exchange 2010 System Requirements.

You can either run Exchange 2010 Setup.exe or navigate to Control Panel to modify or remove Exchange 2010 (either server roles or an entire installation).

1. The Maintenance Mode page of the Exchange Server 2010 Setup wizard begins the process of changing or removing your Exchange installation. Click Next to continue.
   
   
2. On the Server Role Selection page, select the Exchange server roles that you want to add (if you're changing an installation) or remove (if you're removing one or more server roles or an entire installation). Click Next to continue.
   
   
3. On the Readiness Checks page, view the status to determine if the organization and server role prerequisite checks completed successfully. If the prerequisites check doesn't complete successfully, review the Summary page to help troubleshoot and fix any issues that are preventing Setup from completing. If the checks have completed successfully, click Install if you want to add a server role or Uninstall to remove the specified server role(s) or the entire installation of Exchange 2010.
   
   
4. On the Completion page, click Finish.