You must ensure that each of the Exchange 2010 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.

To perform the following procedure you must log on by using an account that's a member of the local Administrators group on the computer you're performing the procedures on. Or, the account you use must be a member of the Delegated Setup role group.

You can either run Exchange 2010 Setup.exe or navigate to Control Panel to modify or remove the Exchange 2010 Unified Messaging server role. In Control Panel, you can either remove the specific server role or the entire installation.

1. The Exchange Server 2010 Setup wizard begins the process of changing or removing your Exchange installation on the Exchange Maintenance Mode page. Click Next to continue.
   
   
2. On the Server Role Selection page, select Unified Messaging Role. Click Next to continue.
   
   
3. On the Readiness Checks page, view the status to determine whether the organization and server role prerequisite checks completed successfully. If the prerequisite checks didn't complete successfully, review the Summary page to help troubleshoot and fix any issues that are preventing Setup from completing. If the checks completed successfully, click Uninstall to remove the Unified Messaging server role.
   
   
4. On the Completion page, click Finish.