In an update provided on its TechNet blog, Microsoft says that it will support Windows 10 version 1511 for Enterprise and Education users through April 2018 (via OnMSFT).
From Microsoft:
To help some early enterprise adopters that are still finishing their transition to Windows as a service, we will be providing a supplemental servicing package for Windows 10, version 1511 for an additional six months, until April 2018, providing updates to address critical and important security issues that arise during that time. These updates will be available to anyone using Windows 10 Enterprise, version 1511 or Windows 10 Education, version 1511. Updates will be offered via all normal channels, including Windows Update, WSUS, Configuration Manager, and the Windows Update catalog.
This comes roughly a month after Microsoft officially ended support for Windows 10 version 1511, which was first released to PCs in November 2015. The move is part of Microsoft's larger "Windows as a Service" (WaaS) model, under which new major feature releases are flighted to the public at a more rapid pace. As a result, each major release is only supported for a limited time.
There was speculation that support may have been extended, as Microsoft pushed out a small cumulative update to version 1511 weeks after support had officially been dropped. If you're running Windows 10 Enterprise or Education, you should continue to receive updates to version 1511 through April 2018. Anyone running Windows 10 Home or Pro should upgrade to the latest version of Windows 10.
