Outlook Messenger is a new concept messaging solution for interactive communication within Office Network (LAN). In addition to usual Rich Text Chat, Voice Chat, Group Chat and Send File functions, Outlook Messenger is plugged into Microsoft Outlook, enabling the users to share their MS Outlook Emails, Contacts, Appointments, Notes and Tasks among the other Outlook users. Good news for novice users. This Lan Messenger will run instantly after installing on all the network computers, because its Server-less and no need to configure any IP Addresses.