The OCS 2007 Archiving and CDR Server allows you to
comply with any laws and/or policies that require retention of IM communications.
We??™ve touched on some of the issues important to a new installation. Now let??™s take a
look at upgrading.
Live Communications Server 2005 Upgrade
If you are running Live Communications Server 2003, you??™ll fi rst need to migrate your installation
to Live Communications Server 2005 with SP1. Microsoft has supplied a migration guide,
which you can download at www.microsoft.com/downloads/details.aspx?familyid=20f67afc-
6af5-4a03-99bf-4150def36457&displaylang=en. You can then complete your migration to
OCS 2007.
When you have Live Communications Server 2005 with SP1 Access Proxies deployed,
your only choice is to migrate your environment from the outside in. Think about it.
OCS 2007 uses Access Edge Servers, not Access Proxies. To perform the upgrade you??™re
going to have to start by upgrading the Access Proxies. So, the fi rst thing you need to do is
replace your Access Proxies with OCS 2007 Access Edge Servers, and only then can you
migrate to OCS 2007 in your internal environment.
Microsoft Office Communications Server 2007 ??? Chapter 2 61
If you follow a phased approach such as described here in which you upgrade all the
servers of a particular type at one time, you??™ll be able to save yourself a great deal of system
downtime. The supported order is as follows:
1. Replace all your Access Proxies in the perimeter network with Access Edge Servers.
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