To renew a self-signed certificate and chained certificate
 

1. Login to administrative console
2. Click Security > SSL certificate and key management.
3. Under Related Items, click Key stores and certificates.
4. Click the appropriate <keystore name> to which you want to add the new certificate.
5. Under Additional Properties, click Personal certificates to list the personal certificates.
6. Select a personal certificate from the list.
7. Click the Renew button.
8. Click Apply then OK.