Hello @saradha ,
In the event that you are using already generated keys, the configuration would be very similar - the only major departure from the instructions previously provided would be to not run the certly.sh script, and instead to utilize the existing cert files you have to generate a broker truststore and keystore, and a client truststore and keystore. This certly.sh script simply automates this process for you, and generates new certificates when executed.
The exact method to generated a JKS trust and keystore for your existing certificates will differ depending on the format your certificates are currently in, though the Swarm configuration will remain the same.
Best,
Aaron from the HiveMQ Team