This optional parameter works around problems with some LDAP servers. Normally, when ServerChecksPassword is set, after Radiator checks a users password the LDAP connection is not unbound. This can cause problems with some LDAP servers (notably Oracle ID and Novell eDirectory), where they unexpectedly cause the following LDAP query to fail with LDAP_INAPPROPRIATE_AUTH. Setting this flag causes an unbind after each ServerChecksPassword bind.