@EddyChan  NiFi should only be generating a keystore and truststore on startup if you have not manually configured NiFi's nifi.properties file to use your personally generated keystore and truststore files. Even if they are generated, NiFi would still use your configured keystore and truststore files. Please help our community thrive. If you found any of the suggestions/solutions provided helped you with solving your issue or answering your question, please take a moment to login and click "Accept as Solution" on one or more of them that helped. Thank you, Matt ... View more