http://blogs.msdn.com/zxue/archive/2009/07/07/taking-advantage-of-microsoft-online-services-bpos.aspxMicrosoft Business Productivity Online Standard Suite (BPOS) is hosted online services by Microsoft that includes business-class e-mail, instant messaging, and the latest messaging and collaboration features. BPOS offers solutions for small businessesen-USCommunityServer 2.1 SP1 (Build: 61025.2)