SAN/UC TLS certificates
Subject Alternative Name (SAN/UC) technology allows you to secure multiple domains (entities) with a single TLS certificate. This feature can significantly reduce the cost of securing multiple web projects (like Exchange, webhosting, etc.).
Thanks to SAN/UC technology you can secure multiple domains (FQDN), public IP adresses, exchange servers, etc. You can add more domain names anytime later. This type of TLS certificate is perfect for securing Microsoft Exchange server and Microsoft Office Communication Server.