Multisite https on view site links

We have a multisite with a ssl certificate on the primary domain and all subdomains.

The mapped domains do not have ssl certificates. But from the WP Admin area all "view site" links are https://mappeddomain.com whereas we need them to be http://mappeddomain.com but I do not seem to be able to change any settings to achieve https on the admin but just http on the view site links.

What am I missing?

Regards

Drew