1 Windows PC client programs and/or features only. Cannot be used across devices.
2 Users can connect the following versions of Outlook to their hosted email, so they can use the rich client application they already know: the latest version of Outlook, Outlook 2010, Outlook 2007 (with slightly limited functionality), Outlook 2011 for Mac, and Outlook 2008 for Mac.
3 These mobile apps do not require a subscription, but may have other requirements.
4 Lync Server 2013 Plus CAL requires a customer to purchase and deploy an on-premises Lync Server to enhance or replace traditional PBX systems.