Step by Step: Lync Client for Mac 2011 and Office 365

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    Recently we released the new Lync client for the Macintosh platform and customers have asked if it will work for Lync Online and Office 365?  Yes, but we will need to make two minor updates:

      1. Enter your Office 365 username and password, making sure to include the full username including your domain.  Then click on the “Advanced” settings to modify the connections settings
      2. Put in “sipdir.online.lync.com:443” for both the internal and external server name.
      3. Save the changes and proceed to sign in.

    Sam Fong – MSFT

    https://blogs.technet.com/b/office365_canada/archive/2011/11/09/tutorial-lync-for-mac-2011-and-office-365.aspx