Got it! thx to @Serg008 for modding the BIOS to SLIC 2.4 and to @Tito for helping me with the XrML install. Now W2016 Standard Edition is activated and working like a charme! BTW: what about a newer version of Srv 2016? W10 is at 1803 and Srv still stuck at 1607... thx and best regards Peter