@SandeepN5021 It is not always mandatory to restart the app server after updating the Keystore and Truststore certificates. Many modern servers, like WebSphere, WebLogic, and JBoss/WildFly, support dynamic reloading of certificates without a restart, but this depends on how the server and SSL context are configured. Some servers may require you to manually trigger a reload of SSL configurations or clear caches to apply the changes. In Pega, certificates can often be updated without a restart, but it’s good practice to verify by testing in a lower environment and checking logs for SSL/TLS errors. If the server does not support dynamic reloads, a restart might be needed to load the new certificates. Always plan updates during maintenance windows to minimize disruption and ensure proper functionality.