The accidentally released Windows 10 Build 16212 belongs to the “rs_edge_case” branch, different from the rs_prerelease, the default branch for insider preview builds. We have already seen few new features getting revealed by those exploring the code of Build 16212.
Now, Build 16212 code reveals Three new and upcoming Windows SKUs. Two of these Three SKUs are Windows 10 SKUs named as Windows 10 Pro for Advanced PCs and Windows 10 Pro N for Advanced PCs. This may be related to upcoming always-connected PCs announced by Microsoft or maybe something different too.
The third SKU is called Windows Server 2016 ServerRdsh. As per the source tweet, Windows Server Rdsh can be upgraded to Windows 10 Education version. Check the image posted in the tweet below.
— Kingshuk 'Tito' De (@AndItsTito) June 4, 2017
In case you want to try (at your own risk), you can download the Windows 10 Build 16212 leaked ISO by clicking here.