Hi JamieJackson,
Thank you for posting your query on Symantec Forums. My name is Azhar Khan and I am the Sr.Technical Support Engineer with Symantec Endpint Protection.
Here are the public article to know about SEPM Certificates.
About server certificates
https://www.symantec.com/docs/HOWTO81145
Generating a new server certificate
https://www.symantec.com/docs/HOWTO81085
Hope this helps you!
Thank you
Regards,
Azhar Khan
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