http://blogs.technet.com/b/ucedsg/archive/2009/02/06/we-have-the-edge.aspxThe topology for OCS architecture has changed for R2. We know support three topologies: Consolidated Edge Load Balanced Consolidated Edge Multi-Site Consolidated Edge Consolidated Edge – in RTM We needed a Public IP address for the outside edge. In R2en-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)http://blogs.technet.com/b/ucedsg/archive/2009/02/06/we-have-the-edge.aspx#3198440Sat, 07 Feb 2009 05:57:51 GMTd5e57398-b9ef-4490-9955-07cbb4e4a80d:3198440Blogs from the Microsoft Field<p>The topology for OCS architecture has changed for R2. We know support three topologies: Consolidated</p> <img src="http://blogs.technet.com/aggbug.aspx?PostID=3198440" width="1" height="1">