SamrPolicyHandle policyHandle = null;
        SamrDomainHandle domainHandle = null;
        samr.SamrSamArray sam = new samr.SamrSamArray();
        MsrpcEnumerateAliasesInDomain rpc;

synchronized (sid_cache) {
        try {
            handle = DcerpcHandle.getHandle("ncacn_np:" + authorityServerName +
                    "[\\PIPE\\samr]", auth);
            policyHandle = new SamrPolicyHandle(handle, authorityServerName, 0x02000000);