Client Access Server Role
The Client Access server role in Exchange 2007 is similar to the front-end server in
Exchange 2003. The Client Access server role provides Outlook Anywhere Access, formally
known as Outlook Web Access and HTTP/RPC. The Client Access server role also supports
connectivity for Windows Mobile devices. The Client Access server role can exist on the same
physical server as other server roles.
Edge Transport Server Role
The Edge Transport server role resides in the DMZ of your network and is not a domain-joined
server. The Edge Transport server role is in charge of external SMTP connectivity and
provides antivirus, antispam, and encryption services for messages received from or destined
to the Internet. You cannot install the Edge Transport server role on the same server as other
roles, as it should reside in the DMZ of your network.
Unifi ed Messaging Server Role
The Unifi ed Messaging server role is necessary if you plan to provide UM services in your
Exchange deployment. The Unifi ed Messaging server role provides connectivity between the
VoIP gateway and your Exchange 2007 infrastructure. Though not recommended in most
production environments, you can install the Unifi ed Messaging server role on the same physical
server as other server roles.
Confi guring
Exchange 2007 Unifi ed Messaging
Now that you are familiar with the Exchange 2007 architecture basics, it??™s time to set up and
confi gure Exchange 2007 UM. Assuming that you have an existing Exchange 2007 infrastructure
set up and confi gured properly, let??™s install and confi gure a new UM server to support UM.
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