CHAPT ER
11-1
Networking Guide for Cisco Unity Release 5.x (With Microsoft Exchange)
OL-13844-01
11
Migrating from SMTP Networking to VPIM Networking

Overview

This chapter provides information on migrating from SMTP Networking to VPIM Networking for
messaging between Cisco Unity servers that access different directories. Because Cisco Unity 4.x was
the last train that supported the SMTP Networking option, customers who need to network Cisco Unity
servers that access separate directories must migrate to VPIM Networking instead of using SMTP
Networking after upgrading to Cisco Unity 5.0 or later.
Both SMTP Networking and VPIM Networking use SMTP as the mechanism for exchanging messages,
but the message format differs. SMTP Networking uses a proprietary message format, while the message
format in VPIM Networking adheres to the VPIM industry standard. In addition, VPIM Networking
provides functionality that is not available in SMTP Networking. See the “VPIM Networking” chapter
for more information.
Prerequisites
Before starting the migration, verify that the following prerequisites have been met:
The servers have already been upgraded to Cisco Unity 5.x as described in the Reconfiguration and
Upgrade Guide for Cisco Unity Release 5.x (With Microsoft Exchange), which is available at
http://www.cisco.com/en/US/products/sw/voicesw/ps2237/prod_installation_guides_list.html.
A license file with a VPIM license has been obtained and installed on the Cisco Unity Bridgehead
server.
Cisco Unity and Exchange meet the requirements as described in the “VPIM Networking
Requirements” section in Networking Options Requirements for Cisco Unity, at
http://www.cisco.com/en/US/products/sw/voicesw/ps2237/prod_installation_guides_list.html.