How to install a SSL Certificate for Lotus Domino 6.0 - 8.0

Copy the Intermediate CA certificate from your Secure128 portal under “Order Details”.
Be sure there are 5 dashes to either side of the BEGIN CERTIFICATE and END CERTIFICATE and that no white spaces, extra line breaks or additional characters have been inadvertently added.
From the Lotus Notes client, open the Server Certificate Admin application
Click Install Trusted Root Certificate into Key Ring
Enter the name of the key ring file that will store this certificate. You specified this name when you created the CSR
Import your Trusted Root Certificate (TrustedRoot.txt). You may see a message that your root certificate is already installed. If this happens, just continue to the next step.
Click Merge Trusted Root Certificate into Key Ring
Enter the password for the key ring file, and then click OK
Once again, choose the option to "Install Trusted Root Certificate into Key Ring".
You should now install your Intermediate Certificate files
Repeat the above steps to install the previously saved as intermediate.txt
Enter the password for the key ring file, and then click OK

The SSL certificate will be sent by email. The certificate is included as an attachment (Cert.cer) and it is also imbedded in the body of the email. Copy the certificate.
The text file should look like this:

-----BEGIN CERTIFICATE----- [encoded data] -----END CERTIFICATE-----

Be sure there are 5 dashes to either side of the BEGIN CERTIFICATE and END CERTIFICATE and that no white space, extra line breaks or additional characters have been inadvertently added.
From the Lotus Notes client, open the Server Certificate Admin application
Click Install Certificate into Key Ring
Enter the file name for the key ring that will store this certificate. You created this key ring file when you created the Certificate Signing Request
Enter name of the key ring, and then import your Primary Certificate (SSLCert.txt) file
Click Merge Certificate into Key Ring
Enter the password for the server key ring file, and then click OK to approve the merge
Your certificate is now installed and ready to use on your IBM Domino Server.