The Subject Alternative Name (SAN) SSL certificate, also called the Unified Communication Certificate (UCC) or the Multi-Domain SSL certificate was particularly developed to secure all your domains and subdomains by owning one single SSL certificate. This type of certificate ensures the security for both, your internal and external domains/subdomains and is fully compatible with your Microsoft Exchange products and Microsoft Office Communications Server.
UCC/SAN SSL certificates are not just easy to be managed but are the most cost-effective option. These certificates give you the opportunity to secure your main domain, for example, ssldragon.com, together with many other totally distinct domains, like ssldragon.net, ssldragonsslcertificates.com and its subdomains mail.ssldragon.com and account.ssldragon.com – all with 1 single certificate. Besides, unlike Wildcard SSL certificates, UCC/SAN certificates are available in all three validation methods: Domain Validation (DV), Business Validation (BV) and Extended Validation (EV).
You can find our full list of Multi Domain (UCC/SAN) SSL Certificates at this link.