Hello, I'm using freeRaduis version 2.1.12+dfsg-1.2. I'm trying to get some parameters from an AD server but I have problems with the search filter. Here is my ldap configuration: ldap { server = "myldapserver" basedn = "dc=ad,dc=domain,dc=fr" identity = "cn=LinOTP-Auth,ou=AD-Man,ou=Ressources,dc=ad,dc=domain,dc=fr" filter = "sAMAccountName==%{User-Name}" #base_filter = "(objectclass=sAMAccountName)" start_tls = no groupmembership_filter = "(|(&(objectClass=GroupOfNames)(member=%{Ldap-UserDn}))(&(objectClass=GroupOfUniqueNames)(uniquemember=%{Ldap-UserDn})))" #profile_attribute = "radiusFramedIPAddress" profile_attribute = "radiusprofile" access_attr = "uid" dictionary_mapping = ${raddbdir}/ldap.attrmap ldap_connections_number = 10 timeout = 4 timelimit = 5 net_timeout = 1 set_auth_type = yes } I'm not sure about the filter parameter. Here are freeradius logs: [ldap] performing user authorization for hatim [ldap] expand: sAMAccountName==%{User-Name} -> sAMAccountName==hatim [ldap] expand: dc=ad,dc=domain,dc=fr -> dc=ad,dc=domain,dc=fr [ldap] ldap_get_conn: Checking Id: 0 [ldap] ldap_get_conn: Got Id: 0 [ldap] attempting LDAP reconnection [ldap] (re)connect to myldapserver:389, authentication 0 [ldap] bind as cn=LinOTP-Auth,ou=AD-Man,ou=Ressources,dc=ad,dc=domain,dc=fr/ to myldapserver:389 [ldap] waiting for bind result ... [ldap] Bind was successful [ldap] performing search in dc=ad,dc=domain,dc=fr, with filter sAMAccountName==hatim [ldap] ldap_search() failed: Operations error [ldap] search failed [ldap] ldap_release_conn: Release Id: 0 ++[ldap] returns fail Can you help me please? Thank you!