The nostalgia for periodic big upgrades every five to 10 years is seriously misplaced, and it's not good for users or IT
Last month Microsoft started sounding the "end of support"
death toll for Exchange 2007. Admins have a year to plan and migrate to
either Office 365 or a newer version of on-premises Exchange. (If you
go with on-premises Exchange, I recommend Exchange 2016 because Exchange
2013 is already three years into its 10-year support cycle and Exchange 2016 is a slightly beefier version of Exchange 2013 -- basically, you get three extra years of support by adopting Exchange 2016.)
