Was watching OITNB at home when boss called sounded urgent about SSL not working on one of our subdomains. We use a paid cloud app for some of our reports which. So the subdomain is a CNAME to the providers app subdomain. Recently there was an upgrade at our hosting but it shouldn't be related.

Boss: Hey, there is an error prompt when I visit our reporting site with https
Me: That's cos we never installed any SSL cert for that subdomain.
Boss: Well it worked before and you will need to get it fixed.
Me: Wait.. It worked before? How is that possible? We've never set it up and the subdomain is a CNAME pointing to another site which we don't own. The cert will have to load from their server and we have not done any setup with them.
Boss: I'm very sure it worked before the hosting upgrades. All along our customers has been accessing with https.
Me: Okay.... That's something new because and I am pretty SURE the last I checked, the app provider doesn't allow that yet.
* meanwhile I when to search the app provider docs and it says not able to support multiple SSL yet for CNAME
Me: Look, it says so here in the docs.
Boss: Ok, can you try to fix it as its important for the users to not see that error. It has been working all along.
Me: Hmmmm... I'll get back to you.

How do I fix something that didn't exist / broken?? How did it work before??

I know it can be possible to install the cert on the cloud provider end but we haven't done this before. And their support docs says feature not available yet.

Was it magic?? Am I missing something?? Anyway, I've sent an email to the provider's support team and telling them "it worked before"