When designing Lync Server 2010 topologies there are multiple options available for deploying a Monitoring Server and an Archiving Server. Lync Server 2010 server roles can be collocated. Collocation improves network efficiency, increases flexibility, and reduces hardware costs. This article explores several alternative scenarios to consider when deploying a Monitoring Server or an Archiving Server.
Read more at source: http://blogs.technet.com/b/nexthop/archive/2012/01/31/next-level-topologies-for-archiving-server-and-monitoring-server.aspx
Cheers,
Anderson Patricio
http://blogs.msexchange.org/patricio
Twitter: @apatricio