Exchange Team released the new version of the Exchange Server Role Requirements calculator including support for Exchange Server 2016 and ReFS on the script output.
v7.8 of the calculator introduces support for Exchange 2016! Yes, that’s right, you don’t need a separate calculator, v7.8 and later supports Exchange 2013 or Exchange 2016 deployments. Moving forward, the calculator is branded as the Exchange Server Role Requirements Calculator.
Read more at souce: http://blogs.technet.com/b/exchange/archive/2015/10/15/exchange-server-role-requirements-calculator-update.aspx