With the Current Branch for Business (CBB) declaration of Windows 10 1607 (1607 = RS1 = Build 10.0.14393) on November 29, 2016, and the release of updated media for Windows 10 1607 on Windows Update for Business (WUfB), Windows Server Update Services (WSUS), and MSDN (on 1/19/2017) and on the Volume Licensing Service Center (VLSC) (on 1/26/2017), the 60-day grace period for Windows 10 1507 (1507 = TH1 = Build 10.0.10240) began.
What does that boil down to?
With the availability of Windows 10, version 1607 to the VLSC on January 26th, the grace period for Windows 10, version 1507 will begin. That means, after May 2017, Windows 10, version 1507 will no longer be serviced. This is because only the two most current CBB versions are actively serviced.
- “Overview of Windows as a Service” - https://technet.microsoft.com/en-us/itpro/windows/manage/waas-overview
- “Quick guide to Windows as a Service” - https://technet.microsoft.com/itpro/windows/manage/waas-quick-start
- “Windows 10 release information” - https://technet.microsoft.com/en-us/windows/mt679505.aspx
- “Windows 10 1607 is now a Current Branch for Business (CBB) release” (November 26th Blog Post) - https://blogs.technet.microsoft.com/windowsitpro/2016/11/29/windows-10-1607-is-now-a-current-branch-for-business-cbb-release/
- “Windows 10 v1607 media now available” (January 19th Blog Post) - https://blogs.technet.microsoft.com/windowsitpro/2017/01/19/windows-10-v1607-media-now-available/