Whether you bought domain from godaddy or not. Whether either of your domains are hosted on godaddy or not but if you bought SSL from godaddy:-
- you got to go to My products in godaddy
- Go to SSL certificate, click manage on the domain you want to change from.
- click on the middle one, Rekey & Manage
- expand Change the site that your certificate protects and uncheck?Change to a hosted domain , type in your new domain name and off course, SAVE!!
5.Generate CSR using your server console or Cpanel ( Part of Installing SSL on ubuntu 16.04 apach2)
6. Submit all saved changes:-
7. It will take godaddy some time to generate SSL:-