After I have copied and renamed the file sample-applicationContext-externalAuth-LDAP.xml (renamed without prefix sample), I write the external.ldapUrl property like this : <bean id="ldapContextSource" class="com.jaspersoft.jasperserver.api.security.externalAuth.ldap.JSLdapContextSource"> <constructor-arg value="ldap://hostname-ldap-db:389/o=System CC,c=It"/> After restarting the Jasper Server, the error Apache Tomcat 404 occurs, are ther any problem with my base DN (o=System CC,c=I)? The users properties by query ldap are : ou=users,o=System CC,c=It Thank you for your help in advance