I tried to set the user to something other than root but it would only let me set the display name. Moreover, when I submitted it, virtualmin went back to its lobotomized state.
I guess the question is:
Once “root” is assigned to an imported site’s “Administration username”, how can one change it to be the username created with the site?
eg: abc.com is the imported site and there is a username “abc” but “Administration username” is set to root.