Unified Communications Certificate (SANS UCC Certificate)
Use Subject Alternative Names (SANs) to Secure Your Entire Environment
Unified communications (UC) certificates (also called SAN certificates) use Subject Alternative Names to secure up to 4 domains, sites, and subdomains with one certificate. For example, with a UC certificate you can secure www.example.com, www.example2.com, www.example3.net, mail.example.net, dev.example2.com, etc. This makes UC certificates perfect for Exchange/OCS environments or any environment where you need to secure multiple names across different domains.