What are Unified Communications (UC) Certificates
A Unified Communications certificate (UC Certificate) is a more recent type of certificate developed. The UC certificate was created mostly for use with Microsoft Exchange 2007 and Microsoft Office Communications Server 2007 products.
What makes UC certificates different from dedicated SSL certificates is that UC certificates allow you to secure your main website (www.yourdomain.com) and any other domain that you might control (www.yourdomain.net). This can simplify situations that would require multiple IP addresses because one IP address per certificate is normally required.
In the Subject Alternative Name field (SAN), multiple domain names or common names can be entered making the certificate able to work on any of the included domain names. This allows one certificate to secure both internal network names as well as external domain names.
UC certificates allow flexibility needed to enable the new Domain Security features of Microsoft’s Unified Communications products such as MS Exchange Server 2007, Office Communications Server 2007, and Live Communications Server 2005. These cutting-edge communication products often require secure encryption between multiple unique hosts.
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