With the availability of Windows 10, version 1607 to the VLSC on January 26th, the grace period for Windows 10, version 1507 will begin. End of servicing for Current Branch (CB) and Current Branch for Business (CBB) will occur on May 9, 2017
Read more: https://support.microsoft.com/en-us/help/4018798/windows-10-v1507-end-of-servicing-for-cb-and-cbb
