2 - I've tried to use this rules:
limits anonymous size.soft=50 size.hard=50
limits dn.exact="cn=replicator_user,dc=domain,dc=com"
size.soft=unlimited size.hard=unlimited size.unchecked=unlimited
time.soft=unlimited time.hard=unlimited
limits dn.exact="cn=user1,dc=domain,dc=com" size.soft=50 size.hard=100
time.soft=15 time.hard=60
limits users size.soft=50 size.hard=100 size.unchecked=32767
time.soft=15 time.hard=60
sizelimit unlimited
The "limits users" and limits dn.exact are compatibles ? I guess not.
Finally, this rules works for me:
limits anonymous size.soft=50 size.hard=50
limits dn.exact="cn=user1,dc=domain,dc=com" size.soft=50 size.hard=100
time.soft=15 time.hard=60
sizelimit unlimited
And I've removed the "limits user" of my configuration.
Thanks for help.