Unified Communications Subject Alternative Name Certificate request generator

October 21, 2008 By: Yann Espanet Category: Exchange 2007, Office Communication Server

For your infrastructure, you need a Unified Communications Certificate also know as a Subject Alternative Name Certificate or SAN.

SANs allow multiple names in one certificate. This allows for a single cert-set for Exchange, OCS and all unified messaging. 

There are a number of vendors that can provide you with this type of certificate and they are knows as Unified Communications Certificate Partners for Exchange 2007 and for Communications Server 2007. The advantage of a Unified Communications Certificate is that it makes configuration of Autodiscover much easier; the down side is that currently, this type of certificate can cost up to 10 times more than any existing single name certificates that they may already own.

Here is a list of vendors :

Before acquiring the certificate you need to generate a certificate signing request by using the command-shell in Exchange or the SSL wizard in OCS.

You can use this code generator to easly generate the command to type in the exchange shell :

Launch the code generator

Just fill in the details, click Generate, and paste your customized New-ExchangeCertificate into the Exchange Management Shell on your server:

  1. Login to your Exchange 2007 server
  2. Click Start > Programs > Microsoft Exchange Server 2007 > Exchange Management Shell
  3. Paste the New-ExchangeCertificate command from this page into the Exchange Management Shell window and press Enter
  4. Your CSR file should now be in C:\ on your server (as named by the -Path option in the command itself.)

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