The following filter validates OK with 6u24 but an OpenLDAP library throws error. The filter in question is: (&(objectclass=user)(!(objectclass=Computer))(!(UserAccountControl:1.2.840.113556.1.4.803:=2)(telephonenumber=+*))) The issue is due to the misplacement of a parenthesis the second"!" is given two operands. The filter should be rewriiten as: (&(objectclass=user)(!(objectclass=Computer))(!(UserAccountControl:1.2.840.113556.1.4.803:=2))(telephonenumber=+*)) The open LDAP library Openldap-2_4_19 throws the following error message: 13:33:20.526 |LDAP Search complete. Code: -7|*^*^* 13:33:20.526 |Failed to find user in directory: LDAP code: -7|*^*^* 13:33:20.526 |LDAP failure getting user entry: Bad search filter|*^*^
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