https://community.cloudera.com/t5/Support-Questions/NiFi-Unknown-user-with-identity-admin-Contact-the-system/m-p/209270#M171224 <A rel="user" href="https://community.cloudera.com/users/86344/wluns32.html" nodeid="86344">@Seongmin Park</A><P>It looks like you are trying to enable LDAP auth in Nifi.</P><P>Were you able to access NiFi UI with certificates before enabling ldap authentication?</P><P>Could you update the values of the below properties from nifi.properties file :</P><PRE><CODE>nifi.login.identity.provider.configuration.file nifi.security.user.login.identity.provider </CODE></PRE><P>Also, are you using AD or OpenLDAP as your LDAP implementation ?</P> Thu, 02 Aug 2018 12:30:20 GMT krajguru 2018-08-02T12:30:20Z