Microsoft offers its Crown Jewel MS-Exchange 2007 and Windows Sharepoint Services as Hosted Messaging and Collaboration Solution. This is a incrimental development of products for Service providers like MS - Internet Services, HMC 3.5 with Exchange 2003.... This solution requires eloborate Hardware and Software Infrastructure covering almost all server products from Microsoft Stable. MS-SQL Server MoM -SCoM Active Directory - CDI ISA SharePoint Provisioning System I fail to understand, why do we need such diverse set of software products to run an already complex mail platform like Exchange in a multi-tenent mode... It not only increases the exposure in terms of complexity but also results in skills shortage to run such a diverse environment. A Seemingly simple deployment tool has so much depth to it that, If we end up making any mistake...it will lead to a long and unanticipated delay.... The some portions of supported software platform do not run on the Latest 64bit windows servers.