With this post plus the one about default NS, you are on trend that will generates hundreds of posts if there is one new for each point that is either not state of the art design or missing feature compared to what underlying component is able to provide.
You perhaps need to read more of this forum to understand a bit more of Zentyal philosophy.
Zentyal offers simplified GUI meaning all parameters are not exposed or available and some design choices are made by Zentyal on your behalf.
I've the feeling that you are testing Zentyal but you rather look for webmin or similar interface.
Of course I might be wrong