Digging into the details of a Microsoft announcement on the formal Windows 10 & Office 365 development cycles [Windows 10 BTW will get new versions or builds in March & September each year], Thurrott found: "... an interesting statement of the end-of-life of traditional Office as we know it."
“Starting October 13, 2020 … Office perpetual in mainstream support will be required to connect to Office 365 services,” the firm noted. “We’re providing more than three years’ notice to give IT time to plan and budget for this change. Until this new requirement goes into effect in 2020, Office 2010, Office 2013 and Office 2016 perpetual clients will still be able to connect to Office 365 services.”
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