Microsoft officials are tightening the screws on Windows 10 users running the Long Term Servicing Channel (LTSC) version of the product, starting later this year. Microsoft will be cutting from ten years to five the length of time it will support the Windows 10 Enterprise LTSC releases, starting with the one coming in the second half of calendar 2021 — which should be Windows 10 21H2, unless Microsoft changes how and when it releases LTSC Windows variants.
Link: Microsoft is cutting Windows 10 Enterprise LTSC support from ten years to five
via http://www.zdnet.com