Microsoft has released its Lync for Mac 2011 14.0.3 update. This update is a hotfix that improves audio quality and applies only to Lync users with these specific devices:
Polycomm CX300 Plantronics Calisto 800 series Plantronics Calisto 540 Logitech B530 Jabra Pro 9450 Sennheiser DW Office Snom UC600 Microsoft LifeCam Studio
The hotfix does not support other devices and Microsoft does not recommend it for any other Lync for Mac users. This is a cumulative . . .
Continue Reading: Lync for Mac 2011 14.0.3 update offers improved device support