> overlay unique > unique_base "o=individus,dc=ghec,dc=fr" > unique_attributes uid > what is the equivalent with ldif method ? slapo-unique cannot be configured with back-config at this time; you will have to use slapd.conf(5). You can see ITS#3781; followup 4 in particular has the list of back-config-aware components, which looks like is still the case in RE23 CVS.