https://community.cloudera.com/t5/Support-Questions/NiFi-Unknown-user-with-identity-admin-Contact-the-system/m-p/209272#M171226 <P>Hi <A rel="user" href="https://community.cloudera.com/users/10531/krajguru.html" nodeid="10531">@krajguru</A></P><P>I have the same issue, I was able to login through certificate "CN=Adminstrator, OU=NIFI", but when I switched to ldap I got an error "Unknown user with identity 'CN=Adminstrator, OU=NIFI'. Contact the system administrator." </P><P>Noting that I created user on Nifi called admin to use it with ldap and changed the configuration of "Initial User Identity" to admin and login identity provider as attached. </P><P>Can you help ?</P><P>Thanks</P><P><A href="https://community.cloudera.com/legacyfs/online/attachments/96480-screenshot-2018-12-26-at-132734.png">screenshot-2018-12-26-at-132734.png</A> </P> Wed, 26 Dec 2018 19:29:53 GMT yahya_najjar 2018-12-26T19:29:53Z