I have Lync for Mac 2011 version 14.0.9 installed and it is not updating my presence properly based on my Outlook Calendar. I have Office installed on the Mac and the two don't sync. If I run Lync on a Windows machine while the Mac client is running, the Mac client's presence will change. As soon as I log out of the Windows client the Mac client reverts back to "Available."
I have set Lync for Mac to update my presence based on my Exchange information.