Fore renewing the administration server certificates, execute the command renew-admin-certs CLI command. Use this command to renew the administration certifications with the nicknames Admin-CA-Cert, Admin-Server-Cert, and Admin-Client-Cert. This command also updates the nodes that are currently running and are accessible with the renewed certificates.
After executing this command, it is recommended that you restart the administration servers and nodes so that the new certificates will be in effect. It is necessary that you re-register a node if the node was offline (not running or was not accessible due to network problems) during the renewal of the certificates. For renewing the administration server certificates, execute the following command.
wadm> renew-admin-certs --user=admin --password-file=admin.pwd --host=serverhost --port=8989 --validity=120
See CLI Reference, renew-admin-certs(1).