Q: Do I have to deploy a new server to support Exchange 2007 UM?
A: No. If necessary resources are available, you can install the Unifi ed Messaging server role
on an existing Exchange 2007 server.
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Chapter 11
Solutions in this chapter:
?– Understanding the Migration from
LCS 2005 to OCS 2007
?– Planning Your Migration from
LCS 2005 to OCS 2007
?– Upgrading Perimeter Servers
?– Upgrading Front-End Servers and
Performing User Migration
?– Removing LCS 2005 from the
Network Environment
?– What to Do Once You??™ve Completed
Your Migration to OCS 2007
?› Summary
?› Solutions Fast Track
?› Frequently Asked Questions
Upgrading to Offi ce
Communications
Server 2007
330 Chapter 11 ??? Upgrading to Offi ce Communications Server 2007
Introduction
Organizations that currently have Live Communications Server (LCS) 2005 and want to
upgrade to Offi ce Communications Server (OCS) 2007 have a defi ned upgrade path to follow.
That path is simple, primarily because there is only one way to upgrade: Use the ???side-by-side???
method of migration. There is no in-place upgrade option of putting a CD into the old server
and performing an upgrade. To perform a side-by-side upgrade, you must have a new OCS 2007
server set up and working; then you need to migrate user accounts and confi gure settings on
the new OCS 2007 environment, and then decommission the old LCS 2005.
However, the migration process isn??™t as simple as replacing each LCS 2005 server one for
one with a new OCS 2007 server.
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