Hi, I'm trying to use the deref overlay with openldap 2.4.26. I have added this to my slapd.d config: dn: olcOverlay={2}deref,olcDatabase={1}bdb,cn=configobjectClass: olcOverlayConfigobjectClass: olcConfigobjectClass: topolcOverlay: {2}deref which is my guess at what the config for the deref overlay should look like, but when I try and use it with ldap search I get this: /opt/ods/openldap/bin/ldapsearch -h localhost -x -w ***** -D "cn=admin,dc=********,dc=com" -b "dc=**********,dc=com" -E!deref=member:mail '(objectclass=groupOfNames)'# extended LDIF## LDAPv3# base <dc=blackspider,dc=com> with scope subtree# filter: (objectclass=groupOfNames)# requesting: ALL# with dereference critical control# # search resultsearch: 2result: 12 Critical extension is unavailabletext: critical control unavailable in context # numResponses: 1 slapd was built with these options: ./configure --with-threads=posix \ --with-tls \ --with-cyrus-sasl \ --enable-ldap \ --enable-debug \ --prefix=%{ldapserverdir} \ --libdir=%{ldapserverdir}/%{_lib} \ --enable-spasswd \ --enable-overlays \ --enable-modules \ --enable-slapi so I assume that slapd has the deref overlay built into it ok. I guess my config for the deref overlay is wrong or incomplete. I looked for a slapo-deref man page, but couldn't find one. Is there documentation of the deref overlay config anywhere? Chris