Overview
Much like Microsoft Exchange, there’s only one way to do an upgrade or migration to Lync Server 2010. The upgrade process is a migration in that Lync must be built on separate servers in parallel to the existing deployment. Also similar to Microsoft Exchange, the upgrade should be done from the outside in. The process is straightforward, with only a few challenging areas. The lack of options can be a blessing in that there is less to go wrong when there is only one right way to do something.
If your organization is still using Live Communications Server (LCS) 2003 or 2005, you need to crawl out from under that rock and upgrade to Office Communications Server (OCS) 2007 R2 as an interim step before moving on to Lync Server 2010. A high-level ...
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