Please make sure to read this page: http://sourceforge.net/p/sipe/wiki/Frequently%20Asked%20Questions/
A third-party Pidgin/Adium/Miranda/Telepathy plugin for the extended version of SIP/SIMPLE used by various products:
* 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
Very good. I have been using it for years now, every day. Piding+SIPE provide more "professional" features than MS clients: buddy bounce, auto-replacement, easy history browsing.
Nice project :) Unfortunatly it seems that the last release (1.18.1) is identified as a trojan by Symantex Endpoint Protection...
Sipe is good! Thanks.
I just wanted to say that I have never seen a finer example of digital office than Office 365.