Domain Mapping Plugin

I'm checking wether the domain mapping plugin is actually compatible with a subdomain as the main network site. i did put a topic in the forums but it's now urgent and i haven't had a resolution .. the forum topic is here ...

https://premium.wpmudev.org/forums/topic/is-it-possible-to-setup-a-domain-mapping-network-if-the-main-network-itself-is-on-a-subdomain#post-377359