You can easily genarate a CSR (Certificate Signing Request) in ISPmanager to issue an SSL certificate for your domain name.
First, check that "SSL certificates" option is turned on for your account. Please note that a dedicated IP address is required for your domain to install SSL certificate on it.
Once you checked the above please fill all necessary fields:
After you saved the "request" you can download and open it to view CSR code and Private Key. CSR generation is complete. You can use the generated CSR to issue/order the SSL certificate.