Extended validation (EV) multi-domain certificates give you the features and flexibility of a Unified Communications (UC)/SAN certificate as well as the additional security and user confidence of extended validation. EV multi-domain certificates use Subject Alternative Names to secure up to 3 domains, sites, and subdomains with one certificate.
For example, with an EV multi-domain certificate you can secure:
This makes EV multi-domain certificates perfect for Exchange/OCS environments or any environment where you need to secure multiple names across different domains. Certificates with extended validation also use the highest level of authentication and were specifically created to boost and maintain customer confidence in ecommerce through a rigorous verification process and specific, EV certificate-only browser cues like the green address bar. EV multi-domain certificates incorporate some of the highest standards for identity assurance to establish the legitimacy of online entities. DigiCert puts applicant websites through rigorous evaluation procedures and meticulous documentation checks to confirm their authenticity and ownership.