N-Way Multi-Master authentication problem

Hello everyone.

I have a big problem releated to 2 OpenLdap configured in N-Way Multi-Master Configuration.

My problem isn’t on replication, that works, but on authenticating users on DIT !!!

Infact when an user tries to simply authenticate himself on DIT with

ldapsearch -x -D 'uid=example@gmail.com,ou=people,dc=example,dc=com' -w 'password'

he receives an

ldap_bind: Invalid credentials (49) error.

Disabling configurations for multi master replication the same user is able to search on DIT.

Following there is one slapd.conf of server 1…

allow bind_anon_dn

# Schema and objectClass definitions

include /etc/openldap/schema/core.schema

include /etc/openldap/schema/cosine.schema

include /etc/openldap/schema/nis.schema

include /etc/openldap/schema/inetorgperson.schema

# Additional schemas

pidfile /var/run/openldap/slapd.pid

argsfile /var/run/openldap/slapd.args

# Read slapd.conf(5) for possible values

loglevel 0

modulepath /usr/lib64/openldap

moduleload syncprov.la

serverID 001

backend bdb

# FIXME: puppet

database bdb

suffix "dc=example,dc=com"

directory /var/lib/ldap

rootdn "cn=admin,dc=example,dc=com"

rootpw password

checkpoint 512 30

dbconfig set_cachesize 0 2097152 0

dbconfig set_lk_max_objects 1500

dbconfig set_lk_max_locks 1500

dbconfig set_lk_max_lockers 1500

#allows read access from all consumers

access to *

by dn.base="cn=admin,dc=example,dc=com" read

by * break

syncrepl rid=000

provider=ldap://ldap-be2

type=refreshAndPersist

retry="5 5 300 +"

searchbase="dc=example,dc=com"

attrs="*,+"

bindmethod=simple

binddn="cn=admin,dc=example,dc=com"

credentials=password

###########################################################

index objectclass eq

index entryCSN eq

index entryUUID eq

index uidNumber eq

index gidNumber eq

index cn pres,sub,eq

index sn pres,sub,eq

index uid pres,sub,eq

index displayName pres,sub,eq

# mirror mode essential to allow writes

#and must appear after all syncrepl directives

mirrormode TRUE

# define the provider to use the syncprov overlay

# (last directives in database section)

overlay syncprov

# # contextCSN saved to database every 100 updates or ten minutes

syncprov-checkpoint 100 10

Slap.conf of 2th server is a copy of this with different serverID and provider.

Every hint will be a bless.

Best regards.