Microsoft released Microsoft Exchange 2016 today.  Exchange 2016 includes many of the features that already a part of Exchange Online and Office 365.  It is considered the next evolution of Exchange 2013.  It focuses on web management interface improvements, and Outlook Web Access improvements.  Exchange 2016 will follow the same servicing model as Exchange 2013 where Cumulative Updates are released every three months.

​To learn about Exchange 2016 see the product guide
Exchange Team Blog about the release

Documentation for Exchange 2016

Michael Spice can help you with your Exchange installation and migration to the version that is best for you.