Question
Can I remove the self registered users container from the user creation dialog?
Answer
Yes, it can be removed by executing the following command as user root in a terminal:
udm container/cn modify --dn "cn=self registered users,$(ucr get ldap/base)" --set userPath=0
In some cases you might also need to restart the UMC:
systemctl restart univention-management-console-server.service
See also: Bug 52679