After obtaining the certificate from a CA, you can install the certificate for a configuration using the Administration Console.
To Install a CertificateNote - You should have the certificate (DER) text from the CA. When you receive a certificate from the CA, it will be encrypted with your public key so that only you can decrypt it. The server will use the key-pair file password you specify to decrypt the certificate when you install it. You can either save the email somewhere accessible to the server, or copy the text of the email and be ready to paste the text into the Install Certificate wizard, as described here.
Click Server Certificates tab > Install button. Optionally click Install Certificate link from the Common Tasks page.
Select Configuration
Select a configuration from the configuration list for which you need to install the certificate. The configuration name is added to the Certificate Signing Request (CSR) text. If you do not see any configuration, check out Creating Server Configuration.
Select Token
Select the token (Cryptographic Device), which contains the keys. If your key is stored in the local key database maintained by Sun Java System Web Server 7.0, choose internal. If your key is stored in a Smart Card or other external device or engine, choose the name of the external token from the drop down list box. Enter the password for the selected token.
Enter Certificate Data
Paste the certificate text in the text area provided. When you copy and paste the text, be sure to include the headers "Begin Certificate" and "End Certificate" -- including the beginning and ending hyphens.
Provide Installation Details
Provide a nickname to be used for the certificate. Select the HTTP Listener from the available list for handling the secure requests.
Review
This page provides you with the summary of selected options. Click Finish to complete the installation process.