If your system uses authorization certificates created by a third-party certificate authority, you may reuse them. Alternatively, you can create authorization certificates using the same service. You can reuse the existing certificates if they are created with the FQDNs and IP addresses of every node in the cluster.
Important:
Authorization certificates are used only for internal communication. Therefore, you can use the System Manager-generated certificates. If you already have a valid pk12-format certificate file, you can skip these steps.