Outlook LAN Messenger is an instant messaging software designed for use within Small, Medium and Corporate Office's Local Area Network. This Intranet Messenger is an ideal replacement for internet messengers in companies, that creates private and secure messaging, and improve internal communications, business productivity and relationships with colleagues inside the company. This software includes Instant Text Messaging, File Transfer, Offline Messaging, Voice Chat, Remote Desktop Sharing, Microsoft Outlook Plugin, Remainder, Alert Notes. This LAN Chat software is compatable in LAN, VPN, WAN, Terminal Service, Wi-fi Networks. Software does not require any Internet connection, and it works across Ethernet port using TCP/IP protocol. Installation can be easily done without seeking system administrator help - Just install the software in all the computers, and the program is ready to use. Users need not add friends' list manually, its automatically done. The 'Admin Tool' allows the administrator to configure Outlook Messenger in all the computers from his computer. The 'Broadcast IP' tool reduces network traffic in subnetwork. The 'Terminal Service' tool supports multiple Outlook Messenger instance running in Single Computer.