# Indices to maintain for this database
#index objectClass                       eq,pres
#index ou,cn,mail,surname,givenname      eq,pres,sub
#index uidNumber,gidNumber,loginShell    eq,pres
#index uid,memberUid                     eq,pres,sub
#index nisMapName,nisMapEntry            eq,pres,sub
index objectClass               eq
index cn                        pres,sub,eq
index sn                        pres,sub,eq
index uid                       pres,sub,eq
index displayName               pres,sub,eq
index uidNumber                 eq
index gidNumber                 eq
index memberUID                 eq
index sambaSID                  eq
index sambaPrimaryGroupSID      eq
index sambaDomainName           eq
index uniqueMember              eq
index default                   sub

=>root@ubuntu:~# slapindex -v
/etc/ldap/slapd.conf: line 113: equality index of attribute "uniqueMember" disallowed
slapindex: bad configuration file!