Hello,
please create a wiki for our elearning team 
Description: wiki-instance to evaluate xwiki and use it for documentation in our team
owner name: armin pagel
wiki name: wiki.ul
alternative wiki-name: elearning
2nd alternative: els
Thank you very much in advance!
You can access your new wiki on https://wikiul.myxwiki.org (you can also access it with the https://wiki.ul.myxwiki.org you requested, but the certificate does not support it yet. I asked to add support for “sub-sub domain” to our infra).
Enjoy !
The answer is “It’s not possible”.
So is wikiul.myxwiki.org enough, or would you prefer to associate your wiki to elearning.myxwiki.org too ?