The Set-ClientAccessServer command lets you set properties on specified Client Access server objects. You can run this command for a single Client Access server or all Microsoft Exchange Server 2007 computers that have the Client Access server role installed in your organization.
To run the Set-ClientAccessServer cmdlet, the account you use must be delegated the Exchange Organization Administrator role.
For more information about permissions, delegating roles, and the rights that are required to administer Exchange 2007, see Permission Considerations.