We have a SaaS web app. We have a wildcard SSL cert on the main domain: *.webapp.com
Customers can add a custom domain to their account, so instead of client.webapp.com they can setup a CNAME to have: clientdomain.com
We have some clients that want to add a SSL cert to their custom domains. Webapp already runs https://client.webapp.com
but they want https://clientdomain.com
We are using apache (via Plesk) on the main server.
Is it possible to achieve this?