As SSL's created based on IP address if your NS havent been resolved yet please do not gohead with this tutorial. If you fail requesting SSL more than 5 times in a short time period your domain might be temporarily banned. Therefor its best to wait atleast couple of hours after you change your DNS to ours. If you can already reach your domain with using our DNS please gohead with below.
Login to Control Panel and Click SSL and Manage SSL
Find the domain that you want to issue SSL
Click Issue SSL
Congratulations ! Successfully completed.
If you receive error message, still go and check your domain in incognito mod to see if it works. If not please do not rerun again to prevent temporary ban we can proceed for you.