http://blogs.technet.com/toml/archive/2009/01/05/ocs-2007-r2-add-enterprise-edition-server.aspxI knew this one going in and I am always dismayed when I encounter it but I wanted to call it out for you while planning. When you choose the option to enable Archiving, CDR and QOE you have to have those roles running before you can complete the addingen-USCommunityServer 2.1 SP1 (Build: 61025.2)