Microsoft Solution for Hosted Messaging and Collaboration version 4.5 gives hosting providers the tools and guidance they need to easily deploy revenue-generating services such as enterprise-class e-mail, calendaring, contacts, and real-time collaboration. Hosted Messaging and Collaboration 4.5 includes the most recent versions of world-class, familiar Microsoft enterprise products such as Exchange Server 2007 Service Pack 1 and Windows SharePoint Services 3.0 Service Pack 1. Version 4.5 also delivers enhanced functionality through its support for Microsoft Office Communications Server 2007, Microsoft System Center Operations Manager 2007. It runs on a platform based on either the Windows Server 2008 or Windows Server 2003 operating system.