If you have not yet created a Certificate Signing Request (CSR) and ordered your certificate, see
CSR Creation from the Server App
.
Intermediate Certificate Installation
For instructions for Snow Leopard Server, please see
Mac Server 10.6 SSL Certificate Installation
.
Copy the file DigiCertCA.crt to the Mac server, then double-click this file. You will then be prompted to enter the administrator's credentials to authenticate to add this certificate to the System Keychain.
Note:
If you get an error message stating that the 'System Roots' keychain cannot be modified, you may have to open Keychain Access, select the System Keychain, and drag the file DigiCertCA.crt into the certificates listed in the System Keychain, then authenticate as the administrator to authorize the change.
Open the Server App, click to select which Mac Server you're installing the SSL Certificate onto, then enter your login details to authenticate.
