Microsoft released a test version of <A HREF="http://www.news.com/News/Item/0,4,30758,00.html">BackOffice Small Business</A> Server 4.5. It features a new set of tools for setup, network management, and Internet connectivity. The server suite includes the Windows NT Server network operating system 4.0 with Service Pack 4, Microsoft Exchange Server version 5.5, Microsoft SQL Server 7.0, and Proxy Server 2.0.