Procedure to do the update of SSL certificate
1. setup>suitecommerce advanced>domain>view
2. Check if DNS is configured correctly.
3.Click on edit
4.Then in certificate tab,enable USE SSL CERTIFICATE TO SECURE DOMAIN and click automatic and enable the agreement .Then save.
Note:
If the domain type is Single Domain for Web Store and Checkout. The checkbox USE SSL CERTIFICATE TO SECURE DOMAIN will not be present .In that case
1.click on change certificate button in the certificate tab
2.Then click automatic and enable the agreement .Then save.
The deployment of certificate will take 4-5 hrs to complete .After the success of deployment.The deployment status will change to live.