"Homebrew" Solution "Marries" 3CX & Microsoft Lync Server
All kinds of cool "homebrew" solutions have been released for Windows Phone 7 and it looks like some "unauthorized" solutions are coming out for 3CX Phone System too! A 3CX administrator has found a way to link 3CX and Lync!
This solution uses FreeSwitch (also a Windows PBX) as a go between.
Note: The author notes that this is not supported by 3CX or Microsoft so do it only on a test system.
If you want to link to Lync using directly there are several Windows PBX's to consider: snom ONE, Brekeke and FreeSwitch. They all support OCS/Lync integration natively.