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 multiple sites (e.g. fully qualified domain names) with one certificate. Four SANs are included in the base price of the UC Certificate, but you can purchase additional names at any time during the lifetime of the certificate.

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.

DigiCert Customer Reviews: ★★★★★ 4.9 (1988)        

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)
5. Additional name (optional)$49 USD(for a 1-year certificate)

Cutting-Edge 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

Perfect Management Solution

DigiCert Unified Communications Certificates offer complete control over Subject Alternative Name field, and allow you to secure up to 25 host names with just one SSL Certificate. Running all services on one IP address 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.


Improved Customer Engagement

A site seal is a visual cue you use to communicate that your site is secure and website visitors can trust you. These users will feel more confident on your site, positively affecting engagement metrics and increasing conversions.

Free and Effective Tools

DigiCert has a large selection of powerful tools that we developed to make managing SSL Certificates easier and more effective. See a list of our tools in the support section of our website.

Works with Any Browser

DigiCert SSL Certificates are trusted by all browsers. You can rest easy knowing you’re using the most secure encryption available, and your customers can access your site without issues.

See a comprehensive compatibility list »

Simplified Maintenance

With a DigiCert UC Certificate you can secure multiple sites, IP addresses, servers, and domains with a single certificate. Save time and money by not having to purchase and manage multiple certificates and monitor expiration dates.

Fastest Certificate Issuance

Certificate issuance often takes days or weeks with other providers. At DigiCert, our validation specialists work 24/7. This lets us issue your certificates in just a few hours.

Unlimited Server License

Other certificates are only licensed for one physical server. DigiCert's unlimited server license allows you to use your UC certificate on as many servers, IP addresses, and domains as you want.

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Free Tier-3 Customer Service

Talk to a friendly support specialist who will answer any of your SSL Certificate-related questions, even if you don’t have a DigiCert certificate! Our award-winning technical support team is available 24/7 to answer your call. Find out firsthand 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

Certificate Installation and CSR Generation Made Easy

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

Leading Security Expert

DigiCert has been leading the security market for more than 10 years. We are the go-to partner for the world's leading brands and have created innovative solutions for emerging markets like the Directed Exchange of healthcare information, WiFi security, and the Internet of Things.

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.

Learn more about EV Multi-Domain Certificates »