XAdES-T timestamp not shown in Word for signed DOCX

[xuanthu2002]

Hello POI team,

I’m using Apache POI OOXML version 5.4.1 to sign a DOCX document with XAdES-T. Although the signature is recognised by Microsoft Word (Word shows it as a valid XAdES-T signature), when I inspect the timestamp information in Word the timestamp details are missing
Here are the key details:

• POI version: 5.4.1
• JVM / OS: Java 8, Windows 10, MS Word 2016
• In _xmlsignatures/sig1.xml, I see <xd:SignatureTimeStamp><xd:EncapsulatedTimeStamp>…</xd:EncapsulatedTimeStamp></xd:SignatureTimeStamp>.
• In Word: Signature status shows “valid signature”, but when I choose “See the additional siging information...”, I see No timestamp information available and No timestamp authority information available.

Here my code:

public static byte[] signWithTSA(final byte[] dataToSign) throws IOException, InvalidFormatException, MarshalException, XMLSignatureException, RuntimeException, TransformException, NoSuchAlgorithmException, InvalidKeyException {
        SignatureConfig signatureConfig = new SignatureConfig();
        signatureConfig.setDigestAlgo(HashAlgorithm.sha256);
        signatureConfig.setKey(PKCS12Utils.getPrivateKey());
        List<X509Certificate> certChain = new ArrayList<>();
        for (Certificate cert : PKCS12Utils.getCertificateChain()) {
            certChain.add((X509Certificate) cert);
        }
        signatureConfig.setSigningCertificateChain(certChain);
        signatureConfig.setExecutionTime(new Date());
        signatureConfig.setIncludeEntireCertificateChain(true);
        signatureConfig.setCanonicalizationMethod(Canonicalizer.ALGO_ID_C14N_EXCL_OMIT_COMMENTS);
        signatureConfig.setXadesCanonicalizationMethod(Canonicalizer.ALGO_ID_C14N_OMIT_COMMENTS);

        // XAdES-T
        signatureConfig.setTspUrl(Constants.TSA_SERVER);
        signatureConfig.setTspRequestPolicy(null);
        signatureConfig.setTspOldProtocol(false);
        signatureConfig.setTspDigestAlgo(HashAlgorithm.sha256);
        signatureConfig.setXadesRole("Owner");
        signatureConfig.setSignatureDescription("Test ký dấu thời gian");
        signatureConfig.setCommitmentType("Ký dấu thời gian");

        signatureConfig.setSignatureFacets(Arrays.asList(
                new OOXMLSignatureFacet(),
                new KeyInfoSignatureFacet(),
                new XAdESSignatureFacet(),
                new XAdESXLSignatureFacet()
        ));

        try (OPCPackage pack = OPCPackage.open(new ByteArrayInputStream(dataToSign))) {
            SignatureInfo signatureInfo = new SignatureInfo();
            signatureInfo.setOpcPackage(pack);
            signatureInfo.setSignatureConfig(signatureConfig);
            signatureInfo.confirmSignature();


            ByteArrayOutputStream out = new ByteArrayOutputStream();
            pack.save(out);
            return out.toByteArray();
        }
    }

Any suggestions or sample code fragments for making the timestamp details visible in Word?