Using Microsoft Exchange And UC Certificate Questions

While using Microsoft Exchange, UC certificate generation and installation should be simple and automatic using the features offered through the server platform. However, there can be some complicated issues that the IT administrator or website manager will have to consider.

It is important to keep in mind that while the Comodo UCC is designed to be used with the Office Communications server and Microsoft Exchange, UC certificate features can also work very well with other servers as well. With this type of flexibility, it is a great addition for any company, business or organization utilizing the specialized types of Microsoft servers as well as servers utilizing other platforms.

You will have additional confidence in using the Microsoft Exchange UC certificate as you know that it has been developed by Comodo in conjunction with Microsoft. As the world's leading online Trust Provider we have the capacity and the working relationship with the leading browser and device developers to work collaboratively to provide these specialized types of products.

Avoid Complications

When using Microsoft Exchange, UC certificate products from Comodo are designed to be able to work with specific features of the server that helps to reduce administrative time as well as provide comprehensive security across multiple different domains all on the same certificate.

The UCC will work with different servers and clients including the autodiscover, outlook (as an email client) and Outlook Web Access, which is the webmail version of Outlook. It will also work with ActiveSync to allow the full synchronization of both the Windows computers on the system and all mobile Windows devices.

This certificate can be used for as many as 100 different domains on a single cert. The basic UCC provides security for three Fully Qualified Domain Names or Common Names, but there is the addition to add another 97 if needed on the same certificate.

With the Comodo UCC, you will have full control over the SAN field. As of October 31, 2015, it is no longer possible to use internal domain names for (secure sockets layer) SSL/TLS products as per the guidelines developed and supported the CA/Browser Forum. As a member of that voluntary organization, Comodo will follow those guidelines and no longer accept internal domain names with a Subject Alternative Name extension or when the Common Name has a reserved IP address or an internal server name.

How to Determine the Primary Common Name

As with any type of SSL/TLS product, there will be a need to list a common name, usually a Fully Qualified Domain Name that is associated with the main URL for access to the server.

This may be different if you are using a mobile device for access that is you are using a PC. Typically, older mobile devices are going to cause the most difficulties with access, so it is recommended to use the Common Name that is used as the URL with that set of devices and then include all other Subject Alternative Name options in the SAN field.

By using this format with the Exchange UC certificate, there are no challenges with warning messages with older devices and browsers. More information on recommendations can be found in our knowledgebase section as well as in the technical library for the Office Communications server 2007 Certificate Wizard.

Exporting and Importing

With the Exchange UC certificate exporting to make a backup copy or to move the certificate onto a new server is easy. There is a single command line that you can enter to export and then import the UCC. It is also possible to get a thumbprint of the certificate through the Exchange Management Shell.

Once in the shell, there is a very simple command of Get-ExchangeCertificate to enter and you will have the thumbprint of the installed UCC. This is helpful if you are having any difficulties with the installation or if you are getting error messages that there is already a certificate with a thumbprint installed on the server.

Each of the command lines, as well as the short instructions for these procedures, are available on the Comodo Knowledgebase under the category of Unified Communications Certificates. Here you will also find additional troubleshooting information and important information on all aspects of the product.

To learn more about the advantages of the Exchange, UC certificate and how to name, install and troubleshoot issues, the staff at Comodo are always here to help. They can be reached by phone at +1 888 266 6361 to answer questions or get in touch with us through the website live help chat system from any page on

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