if (isExternalAuth(getContext(), npa)) {
                        /*
                         * preauthentication
                         */
                        try (SmbSessionImpl smbSession = trans.getSmbSession(getContext().withDefaultCredentials());
                                SmbTreeImpl t = smbSession.getSmbTree(getContext().getConfig().getLogonShare(), null)) {

        }

        if (req.getDomain() != null && getContext().getConfig().isDfsConvertToFQDN() && dr instanceof DfsReferralDataImpl) {
            ((DfsReferralDataImpl) dr).fixupDomain(req.getDomain());
        }
        if (log.isDebugEnabled()) {
            log.debug("Got referral " + dr);
        }

        getContext().getDfs().cache(getContext(), path, dr);
        throw new DfsReferral(dr);
    }