I have installed wordpress multisite

Hi - I have installed wordpress multisite along with a wildcard DNS SSL Certificate on my server.

I created a new sub-site but whenever I attempt to map a domain of that new sub-site to it, it won't use SSL.

Does each user have to purchase their own ssl certificate if they are mapping a new domain to their sub-site of my network even though my server already has a Wildcard DNS Certificate installed on it?

If so, how is this done because their files are on my server but their domain is hosted with Godaddy?

Let me know, thank you!