Contact Support to confirm which Lync server your account is using. *Domains that were recently upgraded from Exchange 2010 to Exchange 2016 are still using Lync 2010 servers which are not compatible with Skype for Business for Mac and Skype for Business Mobile. Read Knowledge Base article on How Can I Connect To My Exchange Server Using POP Or IMAP? for more details. Apple Mac OS X Skype for Business Server 2015 or Lync Server 2013 OSX 10.11 (El Capitan) or OSX 10.12 (Sierra) Outlook Mac build 15.27 (161010) required for Outlook integration Visit System Requirements for Office page for full system requirements. Thunderbird, Windows Live) can be connected to Exchange mailbox only via POP/IMAP protocol. Any mail clients on Windows XP are not supported. Outlook 2003 and Mac Mail on OSX earlier than 10.6 (Snow Leopard) are no longer supported.
