Yes, we support virtually all third-party SSL providers, including Extended Validation (EV) standard, and wildcard certificates.
You’ll want to install a wildcard SSL on your sites if you’re running a subdomain-based multisite.
This will enable you to protect your data and visitors across all of your custom domains under your network using a single certificate for simplicity and more cost-effective spending.
Wildcard aliases are also supported if all of the sub-sites are subdomains of the same domain name.