Microsoft has announced that its Office 2019 to be available in the second half of 2018 will only work on Windows 10 operating system.Office 2019 will ship in H2 of 2018. Previews of the new apps and
servers will start shipping in the second quarter of 2018. Office 2019
apps will be supported on any supported Windows 10 Semi-Annual Channel
(SAC) release.
Office 2019 will provide five years of mainstream support and
approximately two years of extended support. This is an exception to our
'Fixed Lifecycle Policy' to align with the support period for Office
2016. Extended support will end 10/14/2025," the company added.However, there was no change announced regarding the support term for existing versions of Office.This release has no effect on Office for Mac, which is a separate product with a different release schedule.Last year at Ignite,
Microsoft announced Office 2019 -- the next perpetual version of Office
that includes apps (including Word, Excel, PowerPoint, and Outlook, and
Skype for Business) and server.
The support for Windows 10 (versions 1511, 1607, 1703, and 1709) for
enterprise and education customers running certain versions of the
operating system was extended for another six months to help them move
to the latest supported versions of the operating system.

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