GroupWise allows corporate users to manage documents, share calendars, and control project workflow across network operating systems, including Novell NetWare, Windows NT, and Windows 2000. Changes in version 6.5 include improvements to the user interface and to integration tools for third-party developers. The software allows employees to access business information via a Web browser on a desktop or a laptop PC, and from wireless handhelds like Research In Motions BlackBerry devices. Approximately 34 million people use GroupWise, with an average of one administrator per 1000 end-users. Novells GroupWise 6.5 Administrators Handbook is an in-depth, authoritative guide for administrators of GroupWise. It helps networking and messaging professions plan and install a GroupWise system, set up multiple post office domain systems, configure messaging and Internet services, migrate from previous versions of GroupWise, and troubleshoot message flow and fix directory problems.