Thanks for the reply. The OpenLDAP version is *2.4.35*. For the backend, I'm not really sure where to look at, but I found the attribute *olcDbDirectory *in the *olcDatabase={1}mdb,cn=config* entry. It points at the folder */custom/data/openldap-data-oldschema*, where I saw two .mdb files (*lock.mdb* and *data.mdb*). Is it possible that this two MSAccess (?) files are my OpenLDAP backend ? It is running over a Red Hat 6 system. I did an ldapsearch and a slapcat and both of then returned all entries. When I use the Java unboundID framework, if I do a "large" search, some entries doesn't show up, but if I do a specific search, the missing entry is found. Both queries were made par the same framework method... 2016-04-22 21:33 GMT+02:00 Quanah Gibson-Mount <quanah(a)zimbra.com&gt;: