This website is deprecated, and remains online only for historic access to old issues and docs for historic versions of Virtualmin. It has been unmaintained for several years, and should not be relied on for up-to-date information. Please visit www.virtualmin.com instead.
There are a number of options you can tweak in Administrative Options -> Edit Owner Limits.
It sounds like you may want to change the option named "Can rename domains".
-Eric
that's it tyvm