@louis_allen  You should avoid asking additional questions on an existing post that already has an accepted solution.  If the accepted solution does not resolve your issue that you may be having a different problem.   You would get better visibility and a help if you were to start a new question. That being said, if you are having a "javax.net.ssl.SSLHandshakeException", you issue is during client authentication and have not even the point of verifying client authorization.  So you need to take a closer look at the keystores and truststores you have setup on both your NiFi and NiFi-Registry to make sure that a mutual TLS handshake can be successfully negotiated. Feel free to ping me if you start a new community question. Hope this helps, Matt ... View more