Manual Account Configuration
This guide is for configuring your Lync 2013 account on the Microsoft Lync 2011 client for Mac. A guide on downloading the Microsoft Lync Client (2011 for MAC) can be found on our knowledgebase.
Open the Microsoft Lync Client.
Go to Advanced (Cog icon at the bottom of the window).
Select Manual Configuration and enter the settings as shown below:
Internal Server Name: access.hs20.net:443
External Server Name: access.hs20.net:443
Click OK and then enter your login as shown in the control panel into the Email address and User ID fields.
Click Sign In.
Your account is now configured on the Microsoft Lync 2011 MAC Client.