The build corresponds specifically to the installation of KB4015217 , released on Patch Tuesday, April 11, 2017 . OS Version: Windows Server 2016 (Version 1607) Build Number: 10.0.14393.970 Architecture: 64-bit (x64) Release Date: April 11, 2017 Major Integrated Update: KB4015217 ✨ Key Improvements in this Build

The trailing “2021” suggests an administrator researching historical updates for legacy systems undergoing late patching cycles. Indeed, many enterprises running Server 2016 in 2021 still needed to understand the baseline introduced by April 2017 as a prerequisite for later Servicing Stack Updates (SSUs).

Windows Server 2016 was released to manufacturing (RTM) on September 26, 2016, with . The versioning follows the pattern: 14393 = core RTM branch, .970 = cumulative update revision.