What is a Subject Alternative Names (SAN)?

SAN is an optional extension within an SSL certificate that allows you to secure and manage up to 25 domains (quantities depend on certificate authority) on the same server using a single certificate.

SAN Certificates are often used for Unified Communications (UC) to secure Microsoft Exchange Server 2007, Microsoft Exchange Server 2010 and Microsoft Communications Server. For example, a SAN certificate issued to Company ABC using the Common Name (“*.CompanyABC.com”) may be used to secure the following domains:

  • www.companyabc.com
  • www.exchange.companyabc.com
  • www.companyabc.net
  • www.new-companyabc.net

Symantec UC/SAN Certificate

  • Secure up to 100 domain names with a single certificate
  • Enable up to 256-bit SSL encryption
  • Free Norton™ Secured Seal
  • Unlimited free reissues for the lifetime of the certificate
  • Buy, renew, and manage certificates with a single, secure sign-in to Symantec™ Certificate Center

GeoTrust UC/SAN Certificate

  • Secure up to 25 domain names with a single certificate
  • Get unlimited, free reissues for lifetime of certificate