Microsoft Office Outlook 97 to Outlook 2010 network solutions without or in connection with an Exchange Server. OLfolders for Outlook enables the access and sharing of all Outlook data such as contacts, calendars, tasks, emails stored on a different computer from each workstation simultaneously in a given network, a central enterprise wide access to an Outlook structure is possible. The server application OLfoldersServer is installed on at least one computer in a new or given Outlook network, allowing other clients to connect to the data remotely. Access can be restricted by user rights to certain profiles, files or folders inside a file. The server can run either on a dedicated server or on any workstation or notebook; more than one server can be installed in a network. Starting from 2 up to unlimited clients can connect to data stored on the OLfoldersServer. OLfolders can co-exist perfectly in an existing MS Exchange environment, for example to create additional public folders for a group or project and without loosing the connection to Microsofts Exchange Server. For offline access, data can be replicated using our add-on QSynchronization a synchronisation program for Notebooks. An integrated mail server handles the internal and external mail transport. Currently - about 24,000 users in more than 6,000 companies world-wide are using OLfolders for Outlook networks.