@BGabor thanks for your response  I'm trying to understand the difference between two blocks given in the document    #BLOCK1 activeDirectoryRealm = org.apache.zeppelin.realm.ActiveDirectoryGroupRealm activeDirectoryRealm.systemUsername = userNameA activeDirectoryRealm.systemPassword = passwordA activeDirectoryRealm.searchBase = CN=Users,DC=SOME_GROUP,DC=COMPANY,DC=COM activeDirectoryRealm.url = ldap://ldap.test.com:389 activeDirectoryRealm.groupRolesMap = "CN=aGroupName,OU=groups,DC=SOME_GROUP,DC=COMPANY,DC=COM":"group1" activeDirectoryRealm.authorizationCachingEnabled = false activeDirectoryRealm.principalSuffix = @corp.company.net ##BLOCK2 ldapRealm = org.apache.zeppelin.realm.LdapGroupRealm # search base for ldap groups (only relevant for LdapGroupRealm): ldapRealm.contextFactory.environment[ldap.searchBase] = dc=COMPANY,dc=COM ldapRealm.contextFactory.url = ldap://ldap.test.com:389 ldapRealm.userDnTemplate = uid={0},ou=Users,dc=COMPANY,dc=COM ldapRealm.contextFactory.authenticationMechanism = simple also define roles/groups that you want to have in the system, like below; [roles] admin = * hr = * finance = * group1 = * .   could you help me understand?   i want to extract only one group and users from AD, which block should I use. thanks  ... View more