Windows Server build 16257

Windows Server build 16257 is a build of Windows Server version 1803. It was released on 8 August 2017 as the second officialy released build of Windows Server version 1709. Even though Microsoft marks it as a build of version 1709, it is in fact, a build of version 1803 because of it being located in the rs_prerelease branch instead of rs3_release.