Solution

To generate a Certificate Signing Request (CSR) file using Apple Mac OS X Lion server, perform the following steps:

1. Select the server under Hardware in the Server app sidebar
   
2. Click Settings > click the Edit button to the right of SSL Cert
3. Choose Manage Certificate sheet, select the self-signed certificate you want to generate the CSR
4. Choose Generate Certificate Signing Request (CSR) from the Action menu
   
   Enter the Certificate Information:
   
   
   • Email Address - An email address of the responsible party for certificates
   • Common Name - The fully-qualified domain name for which you plan to use your certificate (e.g., - "www.example.com").
   • Organization - The full legal name of your organization. The listed organization must be the legal registrant of the domain name in the certificate request.
   • Organizational Unit (Optional) - Enter the name of a business unit or group. If applicable, you may enter the DBA (doing business as) name in this field.
   • City (Locality) - Name of the city in which your organization is registered/located. Please spell out the name of the city. Note: Do not abbreviate.
   • State/Province - Name of state or province where your organization is located. Please enter the full name. Note: Do not abbreviate.
   • Country - The two-letter International Organization for Standardization (ISO) format country code for the country in which your organization is legally registered.
      
5. Save the CSR file
    

For additional information please see the following Apple Support article:

http://docs.info.apple.com/article.html?path=Server/10.7/en/t_ObtainCASignedCert.html