I can't get it to work. Say my primary domain is networksite.com
and the subdomain is networksite.com/muckersite. I have set the site's primary domain as muckersite.com (which redirects to networksite.com/muckersite in the background). This all works fine when in the admin sections as the domain mapping plugin redirects admin pages to networksite.com/muckersite and the https plugin makes it go over SSL. However when I try to go back to muckersite.com to view the front end it is trying to do it over https. This fails of course because the certificate is for networksite.com and not muckersite.com.