The Comodo Unified Communications Certificate (UCC) is the most effective solution for securing a Microsoft Exchange and/or Microsoft Office Communication Server environment. This single SSL certificate can provide secured communications on many different domains, external, which will reduce the complexity of your server security administration, along with reducing cost. Additionally, this certificate supports the Microsoft Exchange Autodiscover service, which is a new capability on the Exchange platform designed to ease client administration.
The Comodo UCC comes pre-packaged with a total of 5 SANS. So, you can manage and provision 5 domains with just a single certificate. You can additional domains to this certificate if you need, as the Comodo Unified Communications Certificate can cover up to 250 total domains.