Microsoft Unified Communications Certification
The purpose of a communications certificate is to keep your domain names secure. The Unified Communications Certificate was intended to help you keep your domain names and internal network names secure under the same certificate, and its initial design was to work with Microsoft Office Communications Server 2007 and Microsoft Exchange 2007 products.
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Features
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The distinguishing mark between a Unified Communications Certificate and a regular certificate is the SAN field. SAN stands for "Subject Alternative Name," and this field is where you can input as many common or domain names as you would like.
Benefits
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Covering multiple domain and network names under one certificate can save a lot of money, not only for the purchase of individual certificates, but also with the need for fewer computers. Since each certificate requires a unique IP address, fewer certificates means fewer machines are necessary. Finally, the MS applications listed above require the Unified Communications Certificate.
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Cost
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The cost varies, depending on the vendor and the particular features you want. DigiCert, StartCom, GlobalSign and Entrust are four suppliers, and the cost for a one-year Unified Communications Certificate ranges from $99 to $449 as of December 2010, and variable features include speed of issuance, number of certificates, number of possible domains and subdomains to cover, free reissues, number of server licenses, support and warranty.
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References
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