I mentioned I'd do some explaining how the new R2 features work in a prior post. When you install an R2 SE server or EE pool FE you get the choice of installing a number of new capabilities, specifically: Conferencing Attendant (RTCCAA) ...

Few things I've seen come up here recently with R2, so heads up: Forest and Domain functional level - must be at least Windows Server 2003. This differs from OCS which required Windows Server 2000. 32bit DCs - R2 binaries are x64 only so consider...

or at least subscribe to and browse when I can. These lists show in the margin on the LHS of my blog. Tried to be thoughtful about this and grouped them into official Microsoft blogs with product team behind them, Microsoft bloggers that could be folks...