Microsoft’s official release notes for this build highlighted several enterprise-focused fixes:
For global enterprises, en-US is typically the baseline image before adding language packs. windows server 2016 build 14393970 enus april 2017 2021
In summary, the April 2017 update for Windows Server 2016, build 14393.970, is a comprehensive and important update that addresses various aspects of the server operating system. Its features, improvements, and implications make it a valuable resource for IT professionals and organizations seeking to enhance their server infrastructure. Thus, administrators building fresh 2016 images in 2021
Thus, administrators building fresh 2016 images in 2021 often used an en-US ISO with April 2017 already slipstreamed. Skipping straight to a June 2021 update would
: This refers to a specific build of Windows Server 2016. The build number is a unique identifier for a particular version or update of the operating system.
Skipping straight to a June 2021 update would fail because the update’s manifest required at least build 14393.970.