To install your SSL certificate, you will need to do the following:
Please note: Installing SSL Certificates on Lotus Domino Web Server requires that the Certificate files be merged into the same Key Ring that was used to generate the CSR. If you do not have this Key Ring then you will need to have a new certificate issued with a new CSR from a new Key Ring. The certificates must be installed to the Key Ring in the correct order:
Install the Root Certificate (GS_Root.crt)
Open Domino Server Certificate Administration (CERTSRV.NSF). This is in the System Databases in the administration panel of Notes.
Choose Install Trusted Root Certificate into Key Ring. Enter the file name of the key ring that was made when you created your CSR and then install the Trusted Root Certificate (TrustedRoot.crt). You may get a message that the root certificate is already installed as a trusted root. If you receive this message continue to step 3.
Install the Intermediate Certificate (GS_intermediate.crt)
Again choose Install Trusted Root Certificate into Key Ring. Enter the file name of the key ring and then install the Intermediate Certificate.
Install the SSL Certificate (yourdomainname.crt)
This time choose Install Certificate into Key Ring. Enter the file name of the Key Ring, then install your Primary Certificate (your_domain_name.crt) using the Merge Certificate into Key Ring button.
Your SSL Certificate now installed to your Key Ring and it is ready for use on your Lotus Domino Server.