This certificate:

• Will secure up to three subdomains that share a primary domain name (www.yourdomain.com,mail.yourdomain.com, autodiscover.youdomain.com)
• Is perfect for mail servers, like Exchange
• Can be used concurrently on multiple servers
• Can be Organization Validated for additional Trust and Warranty
• Can be used on multiple servers at the same time

Entries:

• Must share the domain name, but a subdomain is not required (yourdomain.com acceptable)
• Cannot represent a wildcard domain name (*.domain.com)