Hi  @Shelton    Steps followed when integrating NiFi with LDAP:-   Step 1:- Generated SSL certificates using tls toolkit   $ ./bin/tls-toolkit.sh standalone -n "ambari.server" -C 'CN=admin,OU=NIFI' -o admin   Generated files using above command:   [root@ambari nifi-toolkit]# tree admin/ admin/ ├── ambari.server │   ├── keystore.jks │   ├── nifi.properties │   └── truststore.jks ├── CN=admin_OU=NIFI.p12 ├── CN=admin_OU=NIFI.password ├── nifi-cert.pem └── nifi-key.key   Step 2:- Did NiFi SSL setup using Apache Ambari UI   2.1) Copied keystore.jks, nifi.properties & truststore.jks in NiFi conf directory   2.2) Configured Apache NiFi SSL setup https://drive.google.com/file/d/1DJUZE7cWseQkWl_En0_Rh_VSI39y3FiY/view?usp=sharing   2.3) Imported CN=admin_OU=NIFI.p12 certificate in browser for Initial Admin Login   2.4) Logged in with Initial Admin Identity via certificates. Also created users and given view & modify privileges in NiFi as mentioned in https://pierrevillard.com/2017/01/24/integration-of-nifi-with-ldap/comment-page-1/    Step 3:- Did NiFi LDAP configuration   LDAP configuration: <provider> <identifier>ldap-provider</identifier> <class>org.apache.nifi.ldap.LdapProvider</class> <property name="Authentication Strategy">SIMPLE</property> <property name="Manager DN">cn=admin,dc=example,dc=org</property> <property name="Manager Password">admin</property> <property name="Referral Strategy">IGNORE</property> <property name="Connect Timeout">10 secs</property> <property name="Read Timeout">10 secs</property> <property name="Url">ldap://ldap_ip_address:389</property> <property name="User Search Base">dc=example,dc=org</property> <property name="User Search Filter">cn={0}</property> <property name="Authentication Expiration">12 hours</property> </provider>   Just wondering is this host existing ?? >> Yes, LDAP and the associated LDIF host exist and tested with ldapsearch   [root@ambari nifi-toolkit]# ldapsearch -x -b "dc=example,dc=org" -h ldap_ip_address -p 389 -D "cn=admin,dc=example,dc=org" -W Enter LDAP Password: # extended LDIF # # LDAPv3 # base <dc=example,dc=org> with scope subtree # filter: (objectclass=*) # requesting: ALL # # example.org dn: dc=example,dc=org objectClass: top objectClass: dcObject objectClass: organization o: Example Inc. dc: example # admin, example.org dn: cn=admin,dc=example,dc=org objectClass: simpleSecurityObject objectClass: organizationalRole cn: admin description: LDAP administrator userPassword:: e1NTSEF9TWpBN21xQ3VVdURYQ1k1cVpRd0x0NjE0NE9HcnVEQm0= # search result search: 2 result: 0 Success # numResponses: 3 # numEntries: 2   After following above steps when I try to login with LDAP users, I am getting unable to login in NiFi UI   Can you suggest where things are going wrong? ... View more