Entrust UC Multi-Domain SSL Certificates


Entrust Multi-Domain Unified Communications SSL Certificates

Get Powerful SSL-based Security for your UC-enabled Communications Environment

Entrust UC Multi-Domain SSL Certificates have been developed primarily for use with Exchange, Lync, or Skype for Business Servers or environments where you need to secure multiple names across different domains. Our UC Multi-Domain SSL Certificates use Subject Alternative Names (SANs) to secure 250 domains, websites or subdomains with one certificate. Plus UC Multi-Domain SSL Certificates come with unlimited reissues, unlimited server licensing, and a website security bundle that finds malware and protects your site from being blacklisted.

Four domains are included in the base of each Entrust UC SSL Certificate. Purchasing more domains, sub-domains or hostnames is easy—and can be bought at just $43 each per year.



The Entrust Trustworthy Seal

Trust comes from meeting and beating your customer’s expectations. That’s why you should let your visitors know they are on a secure website with the Entrust Site Seal. Our seal makes it easy to visibly show that you have taken steps to ensure your site transactions are secure. Once you make your Entrust SSL purchase, you gain access to your individualized seal. Once you’ve posted the seal on your website, your visitors will be able to click on it and easily verify your site’s authenticity and certificate status.

Learn more about the Entrust Trustworthy Seal

Entrust Site Seal

What Unified Communications SSL Certificates Secure

The defining feature of a UC SSL Certificate is the use of the SAN field in the certificate. In the SAN field any number of different domain names or common names. UC SSL Certificates are more cost efficient because they can secure both internal network names as well as external and be enabled to work on any included domain.

For example, you could get one UC Multi-Domain SSL Certificate to cover:

  • yourdomain.com
  • mail.yourdomain.com
  • yourservername.local
  • autodiscover.yourdomain.com
  • example.com
  • dev.example2.com

Check out our Library for More Resources on UC SSL Certificates



Entrust UC Multi-Domain SSL Certificates for Exchange, Lync and Skype for Business Servers

To use the Domain Security feature in a UC SSL Certificate, Microsoft works with public X.509 certification authorities (CAs) to enable secure client access from the Internet to Exchange, Lync and Skype for Business servers.

A UC SSL Certificate from Entrust allows you to deploy the Domain Security feature and enable secure client access from the Internet. While developed for Unified Communications applications, Multi-Domain SSL can benefit anyone looking for simplicity of consolidating many domain names into a single SSL Certificate and single IP address.

Completing the Certificate Enrollment Process
When you buy an Unified Communications SSL Certificate you can add additional domains using the Subject Alternative Name (SAN) extension.

Before you attempt to complete the online certificate enrollment process, take a look at our SSL Enrollment guide. Enrolling is faster and easier if you have collected the information you need before beginning the enrollment process.



What is the Subject Alternative Name field?

In cryptography, X.509 is a standard for a public key infrastructure (PKI) and Privilege Management Infrastructure (PMI). X.509 specifies standard formats for public key certificates, certificate revocation lists, attribute certificates and a certification path validation algorithm.

The Subject Alternative Name is an extension to X.509 that allows various values to be associated with a security certificate.

The purpose of a certificate with SAN is the same as that of other certificates. It provides a means for a server to establish its identity and then set up a secure communication. Certificates with SAN also provide a subject alternative name field that allows additional domain names to be protected with just one certificate.

SAN Certificates or UC SSL Certificates provide significant cost savings in many situations because they secure multiple domain names or sub-domains in one certificate. This can simplify situations that would require multiple IP addresses because one IP address per certificate is normally required.
What can you do with Subject Alternative Names?

  • Secure host names on different base domains in one SSL Certificate.
  • Virtually Host Multiple SSL sites on a single IP address.
  • Greatly simplify your Exchange Server SSL configuration.

Which SSL clients support Subject Alternative Names?

Most mobile devices support Subject Alternative Names.

Internet Explorer, Firefox, Opera, and Safari have all supported Subject Alternative Names since 2003.



Front Line Encryption

Your website’s security is our number one priority. That’s why Entrust certificates feature hybrid 256-bit pre-shared and 2048-bit public key encryption in our root certificates. With support for SHA-1 and SHA-2 algorithms, Entrust SSL Certificates protect your data by offering security that benefits from the best features of both symmetric and asymmetric encryption.

Discover Entrust's Hybrid Cryptosystem


UC Multi-Domain SSL Certificate Pricing

 1 Year*2 Year*3 Year* 
Regular Pricing$319 each$278/year$262/yearBuy Now
Renewal Pricing$309 each$270/year$254/yearRenew Now

* Pricing for United States, Canada and UK. All prices are in U.S. dollars and are subject to change without notice. Canadian Harmonized Sales Tax (HST) is charged on orders from Canada. International customers, please refer to the International tab below.

Additional Benefits & Features

  • Quick Issuance
    Entrust verification begins immediately based upon your certificate request, and your certificate is usually ready within 1-2 days.
  • Easy Purchase
    Certificates can be easily purchased online with a credit card of by calling an Entrust representative.
  • Website Security Bundles
    Website Security Bundles help find malware on your website and protect it from landing on search engine and email blacklists.
  • Multi-Domain Capabilities
    Save time and money by securing up to 250 Multi-Application or UC Environments/domains with a single SSL certificate.
  • Established Browser Trust
    Prevent your customers from seeing annoying trust dialogs.


  • Unlimited Issuance Policy and Server Licenses
    Enable flexible certificate re-issuance when users lose passwords or re-image machines, and install your certificates on an unlimited number of servers.
  • Self-Service Certificate Creation
    Eliminates the wait for manual certificate issuance
  • Convenient Expiry Notifications
    Lessens the risk of inadvertent certificate expiration
  • SHA-1 or SHA-2 Signing Capabilities
    Options to sign your certificate with SHA-1 or SHA-2.
  • SSL Certificate Expertise
    Entrust customer service experts are available to help you through every step of the certificate management lifecycle.


Why Entrust SSL?

Entrust is more than a security company. We’re your partner — real people you can depend on to provide the security, focus and trust you deserve.

And while we do provide a full range of security solutions for all type of organizations, Entrust Certificate Services personnel have one with one purpose in mind – your protection. Let us help you build a layered, identity-based security approach through our comprehensive portfolio of SSL digital certificates and services.

Learn Why Entrust SSL is Right for You



How to Buy a UC SSL Certificate


Before you submit your UC SSL Certificate request to Entrust, please ensure you have the following information:

  • Certificate Signing Request (CSR)
  • Domain is registered to your organization
  • A business phone number that can be found through a third-party directory
  • Billing, technical, authorization and corporate authority contact details
  • Payment method (see below)
  • Back up of your private key
  • Business headquarters and incorporation information

For additional inquires or assistance when buying an Entrust UC SSL Certificate, please review the Entrust SSL Certificate Enrollment Guide.


Credit Cards

Payment Information
Entrust accepts American Express®, Visa® and Master Card®. The credit card will not be debited until the SSL certificate has been issued. An online receipt is provided at the end of the payment process. Purchase orders will be accepted for orders of US $1,000 or more. Once a purchase order has been accepted by Entrust sales, customers will be provided with information on how to submit SSL certificate orders.

For further information about our digital SSL certificates or to place a purchase order, please call 1-888-690-2424 or contact us online.

Online Ordering & Support
If you are using a proxy server, you may experience problems when ordering online. For further information, please visit the Entrust SSL Certificate FAQs or contact Entrust Certificate Services Support.


Interested in Entrust SSL?