AA multi-domain SSL is designed to secure many domain and/or subdomain names.
Multi-domain certificates are mostly used to secure the services of Microsoft Exchange Server (versions 2003, 2007, 2010, 2013), Office Communications Server 2007 or Mobile Device Manager.
Multi-domain certificates can secure the combination of completely unique domains and subdomains with different TLDs (Top Level Domains) except for the local/internal ones: