Since I joined a second DNS Server to my single server ISPConfig configuration, it seems that the dnssec options are missing. I'm not a 100% sure if they where there before, but I definitly had them on another ISPConfig 3.1 Server. Couldn't find any config option that would hide them. Any ideas? EDIT: sorry, just saw that I posted in the wrong category. :-(
Never mind, found this: https://www.howtoforge.com/community/threads/ispconfig-3-1-dnssec-problem.74071/
