Lync does not start on OSX Yosemite (keeps rebooting)

Question

Since I updated my Mac to OSX Yosemite, I can't log in to Microsoft Lync (14.0.9). The program keeps trying to connect, then connects for a second and disconnects back. This doing in an infinite loop.

Changing the language on my computer to "English" resolves the problem. (Similar with this solution, but only the first steps: http://blogs.msdn.com/b/baliles/archive/2014/09/23/lync-for-mac-osx-yosemite-sign-in-fails-repeatedly.aspx) But since my computer's language is Dutch (Nederlands), it has to work as well!

Any ideas?

Solution 1

Microsoft has released a fix for this now, described here and downloadable here.

This fixed the issue for me, no reboot or language changes needed.

Solution 2

For me i was already on English US. I did the followings:-

1. So i changed it to another language.
2. Reboot
3. Changed back the language to English
4. Reboot

and it is working now