Use Subject Alternative Names (SANs) to Secure Your Entire Environment

UCC certificates give you maximum flexibility over your SANs.

Unified communications (UC) certificates (also called SAN certificates) use Subject Alternative Names to secure up to 25 domains, sites, and subdomains with one certificate. Four domains are included in the base price of the UC certificate, but additional names can be purchased.

For example, with a UC certificate you can secure


This makes UC certificates perfect for Exchange/OCS environments or any environment where you need to secure multiple names across different domains.

For an easy way to find all the certificates on your network, use our free SSL Certificate Discovery Tool.

3 Years $239 per year Includes 4 names, additional $89 each
2 Years $269 per year Includes 4 names, additional $69 each
1 Year $299 Includes 4 names, additional $39 each

Unlimited Server License

Most other Certificate Authorities' SSL Certificates (including wildcard certificates) are only licensed for one physical server. But with DigiCert's unlimited server license, you can use your certificate on as many servers as you want. You can even generate separate certificates with unique key pairs for each server. That's the ultimate in flexibility.

You can use a UC certificate to run multiple services (like OWA, SMTP, Autodiscovery, ActiveSync, and Outlook Anywhere) on one IP address.

1. $299 USD (1-year base price)
2. $0 USD (included in base price)
3. $0 USD (included in base price)
4. $0 USD (included in base price)

Or you can add an additional name to secure a total of 5 sites.

1. $299 USD (1-year base price)
2. $0 USD (included in base price)
3. $0 USD (included in base price)
4. $0 USD (included in base price)
5. $39 USD (additional name price)

State-of-the-Art Data Encryption

One of the best ways to protect your website from brute force attacks is to use 256-bit encryption along with 2048-bit root certificates. This hybrid cryptosystem benefits from the best features of both symmetric and asymmetric encryption. DigiCert certificates use the most secure encryption available and support for both SHA-1 and SHA-2 algorithms.

SSL Plus

Complete Flexibility

One of the primary benefits of DigiCert Unified Communications Certificates is the complete control you gain over the Subject Alternative Name field, allowing you to secure up to 25 host names with just one SSL Certificate. For instance, with one UCC Certificate you can secure multiple services (OWA, SMTP, Autodiscovery, ActiveSync, and Outlook Anywhere) in Exchange 2007 or 2010. Running all services on one IP address greatly reduces the complexity of your server configuration and simplifies management. Additionally, you have the flexibility to add, change, and delete any of the SANs on-the-fly to reflect the evolving needs of your network.


Simplified Maintenance

Save time and money by not having to purchase and manage multiple certificates and expiration dates. With a DigiCert UC certificate you can secure multiple sites, IP addresses, servers, and domains with a SINGLE certificate. You don’t have to put multiple IP addresses on your server and assign a different certificate to each address.

Unlimited Server License

Most other SSL Certificates are only licensed for one physical server. But with DigiCert's unlimited server license, you can use your UC certificate on as many servers, IP addresses, and domains as you want. You can even generate separate certificates with unique key pairs for each server.

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99.9% Browser Compatibility

DigiCert SSL Certificates are trusted by all common browsers, email clients, operating systems, and devices. Rest assured that not only are you using the most secure encryption available, but your customers are all able to access your site without issues.

Looking for a comprehensive compatibility list? »

Fast Certificate Issuance

EV certificate issuance often takes days or even weeks with other providers, causing organizations to settle for lower-assurance options. But, with DigiCert’s validation specialists working nearly 24/7, we can typically issue an EV SSL Certificate within a few hours.

$1,000,000 Warranty

DigiCert is committed to the online safety of you and your customers. That's why every DigiCert SSL Certificate includes a $1 million warranty. If we somehow gave you an improperly-issued certificate, your customers would be covered against damages.

Free and Effective Tools

DigiCert has a large selection of free tools that we developed to make managing SSL Certificates easier and more effective. Some of our most popular tools are the SSL Installation Diagnostics Tool and the SSL Utility for Windows. With the SSL Installation Diagnostics Tool you can check a certificate’s chain and locate any problems with your certificate installation. The SSL Utility for Windows helps you manage, troubleshoot, and fix the SSL Certificates on your server with an easy-to-use user interface.

See a list of our tools »

Complimentary Tier 3 Customer Service

When you need a new SSL Certificate, or experience a problem with an existing one, nothing is more frustrating than sitting on hold with customer support while your problems are mounting, only to then be passed onto a tech support rep who may or may not know how to solve your issue. That’s why DigiCert’s award-winning technical support team is available 24/7 to make your life easier. Our experts are standing by to answer your phone call—no waiting on hold or getting passed around. Put us to the test—call the support number at the top of this page with your SSL questions. Your call will be promptly answered by someone who knows what they are talking about. You owe it to yourself to learn why DigiCert is the only Certificate Authority to have earned a perfect 5-star rating on

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DigiCert® Certificate Utility for Windows

Express CSR Generation and Certificate Installation

DigiCert customers can use the DigiCert® Certificate Utility for Windows. Use this tool to eliminate the obstacles when generating your CSRs and installing your certificates. All you need to provide us with during the ordering process is your organization and payment details then we can pre-validate your certificate. Once the pre-validation is done, just click a button in our certificate utility to generate the certificate signing request (CSR) and then you can install your certificate using the utility’s express feature. You can also use the certificate utility to simplify the code signing process.

Learn more about the tool »

Trusted CA

Trusted Certificate Authority with a Good Reputation

DigiCert has been providing SSL Certificates and SSL management tools for over a decade. We assisted in developing the extended validation certificate and worked in conjunction with Microsoft to develop and promote the use of Subject Alternate Names in SSL Certificates. Unlike other CAs who offer dozens or even hundreds of products unrelated to SSL encryption, creating and supporting top-shelf digital certificates is all DigiCert does. This focused energy results in better products and unmatched support.

Need to Secure Multiple Domains with EV?

Unified Communications Certificates can be an ideal solution for networks consisting of a collection of domains and sub-domains. However, if you need the enhanced protection and user confidence provided by "green bar assurance," then you need a DigiCert extended validation multi-domain certificate. All of the flexibility of a UCC with the highest level of assurance possible.

UPGRADE NOW Learn more about EV multi-domain certificates »