You can set the simple display name for a mailbox user in a Microsoft Exchange Server 2007 environment. However, you cannot configure the system so that the simple display name appears in outgoing messages.
Note This feature is enabled in Exchange Server 2003 Service Pack 2 (SP2).
To resolve this problem, install Update Rollup 4 for Exchange Server 2007 Service Pack 1 (SP1) on the Exchange server. For more information about Update Rollup 4 for Exchange Server 2007 Service Pack 1, see the following Exchange Help topic: