Hi Experts,

Am using BizTalk server 2009. I want to receive an AS2 message from my partner and send synchronous MDN. I used two way receive port and configure it as http port. My receive url is /Contoso/BTSHTTPReceive.dll. But my MDN is EMPTY received by my partner. Please help?

Kind Regards,

Ram

What do you mean by an empty MDN? Does it have any headers on it at all?

If the wrong certificate details are configure for an AS2 party your partner cannot decode/decrypt the message it might look blank. I would make sure your partner has all the certificate details.

Thanks,

AS2 messages are structured similar to MIME messages.  If you use a utility like Fiddler to monitor the outgoing messages, you can inspect the message that was delivered to your partner.   I included a sample MDN message below for reference, the computed hash is bold and underlined.  Once you have determined the outgoing message is valid or not, it will be easier to isolate the issue.

Additional information from edit:

Although the important part of the MDN is the signed Received-Content-MIC (bold).  There is also text information that is included in an MDN.  I highlighted that part of the message in bold italic underline below for reference.

The structure of an MDN message (unencrypted) is as follows:

AS2-To: PartnerCompanyName
Mime-Version: 1.0
Message-ID: <80BE52B7-0915-423C-8A25-6C4B5F12F633>
AS2-From: MyCompanyName
AS2-Version: 1.1
Content-Length: 3614
Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg="sha1"; boundary="_E41BAC59-E11A-486B-AC11-0BCA378BFCCE_"
Date: Wed, 14 Feb 2007 22:07:46 GMT
Server: Microsoft-IIS/7.0

--_E41BAC59-E11A-486B-AC11-0BCA378BFCCE_
Content-Type: multipart/report; report-type=disposition-notification;
 boundary="_8F704D39-0A25-427B-83AA-FEE108DC4A81_"

--_8F704D39-0A25-427B-83AA-FEE108DC4A81_
Content-Type: text/plain
Content-Transfer-Encoding: binary
Content-ID: {017F345F-F741-4061-B7CB-4014C884DDB1}
Content-Description: plain

This is an MDN from MyCompanyName.
--_8F704D39-0A25-427B-83AA-FEE108DC4A81_
Content-Type: message/disposition-notification
Content-Transfer-Encoding: 7bit
Content-ID: {24DBD01D-9F37-42B0-AD59-53014B61357F}
Content-Description: body

Final-Recipient: rfc822; PartnerCompanyName
Original-Message-ID: <9FFB5B68-94AC-4A15-8887-EF38157A96E4>
Disposition: automatic-action/MDN-sent-automatically; processed
Received-Content-MIC: uH5VDjcxreFk4xZzk35zDb1IBkw=, sha1

--_8F704D39-0A25-427B-83AA-FEE108DC4A81_--

--_E41BAC59-E11A-486B-AC11-0BCA378BFCCE_
Content-type: application/pkcs7-signature; name="smime.p7s"
Content-Transfer-Encoding: base64

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--_E41BAC59-E11A-486B-AC11-0BCA378BFCCE_-