pidgin sipe

This project develops third-party plugins for the [Pidgin](http://pidgin.im/) / [Adium](http://adium.im/) / [Miranda](http://www.miranda-im.org/) / [Telepathy](http://telepathy.freedesktop.org/) multi-protocol instant messaging clients/frameworks. It implements the extended version of SIP/SIMPLE used by various products: * Skype for Business * Microsoft Office 365 * Microsoft Business Productivity Online Suite (BPOS) * Microsoft Lync Server * Microsoft Office Communications Server (OCS 2007/2007 R2) * Microsoft Live Communications Server (LCS 2003/2005) * Reuters Messaging With this plugin you should be able to replace your Microsoft Office Communicator client with Pidgin / Adium / Miranda / Telepathy.

sipe.sourceforge.net