1. Click Start ==> Programs ==> Administrative Tools ==> Office Communications Server 2007
2. Expand the items in the snap-in until you get to the Enterprise Edition Server that you installed.
3. Right-click on the correct server name and select 'Certificates'.
4.Click next to get the Certificate Wizard welcome screen.
5. Select 'Create a new Certificate' and click Next.
6. Select 'Prepare the request now, but send it later' and click Next
7. Under 'Name' enter name for your certificate. This name is simply a label for the certificate, so you can name it whatever you like such as the server name or the pool FQDN (fully qualified domain name)..
8. Clear the check to 'Mark cert as exportable' and click Next.
9. For 'Organization' enter your EXACT legal company name including Inc, LLC, etc. if applicable
10. For 'Organizational Unit', enter the department such as Accounting or Engineering and click Next.
11. For 'Subject Name' enter the exact Fully Qualified Domain Name of the pool. Select the option to 'Automatically add local computer name' and click Next.
12. Enter your Country, State/Province, and City details and click Next.
13. Choose a file name and location to save your new Certificate Request (CSR). The file will be a text file, so it should be given a .txt extension. Click Save.
14. Review the settings and finish the certificate wizard. This will save the CSR file to the location you entered above.
15. Locate and open the newly created CSR from the specified location you choose in a text editor such as Notepad and copy all the text including:
-----BEGIN CERTIFICATE REQUEST-----
-----END CERTIFICATE REQUEST-----