Hi, I state that I am a beginner to Ldap !!! I have a problem with the configuration of the Chain Overlay. Provider and Consumer are identical CentOS release 6.5 openldap-servers-2.4.40-1.el6.x86_64 On the Consumer: I configured olcPPolicyForwardUpdates=TRUE in the Ppolicy Overlay and olcUpdateRef: ldap://stfalf02devpom.sociale.it in the ldif file of Ldap DB imported the ldif file: dn: olcOverlay=chain,olcDatabase={1}sociale,cn=config objectClass: olcOverlayConfig objectClass: olcChainConfig olcOverlay: chain olcChainCacheURI: FALSE olcChainMaxReferralDepth: 1 olcChainReturnError: FALSE created the directory /usr/local/openldap/etc/openldap/slapd.d/cn=config/olcDatabase= {1}sociale/olcOverlay={4}chain and imported the ldif file: dn: olcDatabase=ldap,olcOverlay={4}chain,olcDatabase={1}sociale,cn=config objectClass: olcChainDatabase objectClass: olcConfig objectClass: olcDatabaseConfig objectClass: olcLDAPConfig olcDatabase: ldap olcDbIDAssertBind: bindmethod=simple binddn="uid=selmopi,ou=admin_esercizio,ou=Utenze,ou=Amministratori,dc=socia le,dc=it" credentials=strofinella mode=self olcDbURI: ldap://stfalf02devpom.sociale.it All operations were successful but the overlay does not work and does not know why, there are no errors in the logs !!! Help, I do not know where to turn !!! Thanks Best Regards Stefano