Click Create CSR.
Enter your organization's details into the form and click Generate to create your CSR:
The Common Name should be the name you need secured (e.g. barracuda.domain.com)
Subject Alternative Names are for additional names you need secured in a Unified Communications Certificate.
Then you can either 'Copy the CSR' to your computer's clipboard so you can use the hotkey 'Ctrl + V' to paste it into the web browser for the ordering process or save the CSR file to your hard drive.