Mac OS X Server SSL Certificate Installation (version 10.5)
Download Certificates
Log in to your DigiCert account and download your Intermediate (DigiCertCA.crt) and Primary (your_domain_name.crt) certificate files.
Open 'Server Admin' then click 'Certificates'.
Click '+' then select 'Import a Certificate Identity'.

Drag the following 3 files into this window then click 'Import':

Assign the SSL Certificate to the desired services:
For Mail:
On the left window panel click Mail.
Click Settings.
Click Advanced.
Click Security.
Assign the newly-installed SSL Certificate to SMTP or IMAP Services.
For Web Services:
Click Web.
Click Sites.
Choose the site you want to select the certificate onto.
Click the Security tab.
Check Enable Secure Sockets Layer (SSL).
Choose the certificate.
At the prompt "Do you want to restart Web now?" Choose Yes.

Your certificate should now be installed and ready to use.
If your web site is publicly accessible, our SSL Certificate Tester tool can help you diagnose common problems.
If you need to disable SSL version 2 compatibility in order to meet PCI Compliance requirements, you will need to add the following directive to your Apache configuration file:
SSLCipherSuite HIGH:+MEDIUM:!SSLv2:!EXP:!ADH:!aNULL:!eNULL:!NULL
If the directive already exists, you will probably need to modify it to disable SSL version 2.
How to install your SSL Digital Certificate.
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