Microsoft Corp chose Internet World, which got underway in New York City yesterday, to launch version 4.0of its BackOffice server suite for building deploying and managing corporate web sites. New this time is the addition of Site Server 3.0 and a five-user license Seagate Crystal Info 5.0, together with all the latest versions of Windows NT, Exchange, Proxy, SNA and SQL servers, Systems Management Server, the FrontPage98 website development tool and an NT option pack containing Internet Information Server (IIS), Transaction Server and Message Queue Server. Microsoft will start beta testing SQL Server 7 (codenamed Sphinx) next quarter. BackOffice ships the end of January, starting at $2,500 for the server suite license and $1,309 for five client access licenses. Upgrades are available from previous BackOffice versions.