http://blogs.technet.com/brettjo/archive/2009/04/21/ocs-r2-dev-technical-briefing-tvp-for-partners.aspxAnnouncing a free “Unified Communication & OCS 2007 R2 Technical Briefing” for Microsoft Partners, 22 May 2009 http://blogs.msdn.com/ukisvdev/archive/2009/04/17/announcing-a-free-unified-communication-ocs-2007-r2-technical-briefing-for-microsoft-partners-22-may-2009.aspxen-GBCommunityServer 2.1 SP1 (Build: 61025.2)