Isn't Enterprise kind of pointless since Ultimate is pretty much the same thing? The difference being MAK/KMS vs Retail/OEM?
But there was Windows Server 2016 key which has been removed since moderators are confident to be Generated. And I heared generating a fake GVLKs or WS2012 SLP key is very easy with Ratobius's tool , althrogh I haven't tested.
Windows 8 onward Microsoft uses pkey2009 algorithm which was publicly reverse engineered in here at MDL.
Explains why you won't find a tool at MDL, unfortunately any tool able to do this will cause confusion .
Is posting SLP keys of windows XP still prohibited now? I have a XP professional key of SHARP , which does not appear on search engines.