Had this NUC featured I219-LM LOM there would have been no trouble with WS2012 R2 or WS2016, but this is not the case. Since Intel LAN driver will not install for I219-V with WS2012 R2 and WS2016, I have lost the ability to get the NUC6i5SYH to boot one of these two server OS in a diskless configuration (using Microsoft iSCSI virtual disk).
I've been trying to get my NUC6i5SYH to run Windows Server 2012 R2 or Windows Server 2016 as part of an experimental audio setup. At this point I'm trying to understand Intel's reasoning for I219-V supporting older Windows Server 2012 but not more recent Windows Server 2012 R2 or Windows Server 2016.