Blank AS2 MDNs (both synchronous and asynchronous)

I have set up a synchronous MDN AS2 agreement with a third party with whom we are exchanging EDI document (AS2 send \receive pipelines).

On the receive side , I am having a problem in sending back asynchronous MDN. Through wireshark I monitored that BizTalk is sending back a blank MDN which doesnt have AS2 headers and hence the partner gets an error that the delivery of their message failed whereas on our BizTalk server, we receive the document successfully and no error is generated. The message exchange sequence when client sends us message as captured via Wireshark is given below .

POST /WOW/BTSHTTPReceive.dll HTTP/1.0
Host: as2uat.costagroup.com.au:75
User-Agent: RPT-HTTPClient/0.3-3I (Linux)
AS2-From: GXS_AS2_ICS
AS2-To: COSTAAS2UAT
AS2-Version: 1.2
Date: Fri, 24 Jul 2015 05:26:18 GMT
Disposition-Notification-Options: signed-receipt-protocol=optional,pkcs7-signature; signed-receipt-micalg=optional,sha1
Disposition-Notification-To: http://as2.am.gxsics.com/enterprise/as2
EDIINT-Features: AS2-Reliability
From: notifyas2@gxs.com
Message-ID: <003646685903804443@as2.am.gxsics.com>
Mime-Version: 1.0
Subject: AS2 Data Message Request
Accept-Encoding: deflate, gzip, x-gzip, compress, x-compress
Content-Type: application/pkcs7-mime; smime-type=enveloped-data
Content-Length: 3392

0...*.H..
.....0....1..0.....0@021.0..
..&...,d....costas1.0...U....Costa Group UAT.
a.2.......0
..*.H..
...........!..I....%c..e..A..Qj......>._..o.3...]g].|....mE......h....f......K%.a......d.?..eRVN9.N?w.......[f .f,..j..T.J.)c8..+.J....A0...*.H..
...0...*.H..
..........7"......r...cvz.\
.}...I.....=+....-..j.L.9u....PiG.d.AkN"...;t.jmZd..voa.....2E......h.6....c......N..=.J=.,.5..:.K..[.........5......<z.6.:_D7?...}XFED.a....t.t.I...,W..S.2.tJ.</....Gc.B......!1...L.e...P..._2t.....*>.....K"..O.P...<..'M.3F ......??
...kv.@m.\O....j.+a...;_.HT..........g..e...<..[$&D..'Fs...f,..yw.......M.W.DS%..c.......z
<.SZM8T..)uf..[J...7.Z|.s..q[5.....b.2......V..n.n..}.>.AH........^.....5J8?.._O..u"g:....Z
...)v....w..y..>.........pB.......VEj....#w.4{.s.../......h%...#g
|..\.c..[.,.;...F...6....:.....
.;.\1<lQn.....'d.]..c..(.c`..Z...{.w.....z..(..........Z...v.../_.X.CH...I......9....d.H0"Xe..XN6.....?.k69.......U=.
`.....ac....k..K...-.Z.?.]].k.'..{...~...U.N....Q....d..........B...wc...)....*.....Py....m.....x..
d.....<...{/D.3\.1w:VG...E...W. ..... 
..'b...)k\......r......._.)...lkt......n...z.kJ.r_,`...nW......... .H.JEDC......%._....,G.........d....\....P\.
?$..4vK..e.S.l..u.....j.uM....,....g....:...b.S..*...%.q..d.."..:.;.....,Mo.d..bhZS..5>...
..%...B|.<....cL.FuS..p.ZJ...... .]...d.w...Np....8...v8.....6...X.....\..@:.l.|.}.^K..~.."...3....,...a.~...K.....).rA....-.U.@.]v.....a..2...n......:.P.G..D.#.O!JX...f..S.......i6M.d../I........[...n....bCA......_c...<...)E....x..3.0..1Bme.8e.{..s...1...a...ntDE9u.8N0..(.......)........6...j...h
.6...&......5...zG....1K..C8.ub3.Y.U7T.Y...E6;k.U..H5.].@]...L.n..+|..-...Tr..+a.;K..... ...T..}C..."Ep....9...G.E.......\...R.Njspm..g...E*B...N4....;...Z.3..:...G=.........h&&*./...!wp...:.....Z....U.'....,-H......#....9P...0....8.&.%.=...~.....A.\Y..#..x..h..$.#f...~;..V..
........<.Z.c.>..... ./..}.N.6e,U....p..y.R5]f.P!K6..X 0.... .....#..g...-Mp........@.
...o.....i.
`..vx.gR.......Zt.....+........c.."c.F..........^..[/.......I.L.9..Ss..~..p.Q..C......n2.k|e.f..|...r..8.....'....x.?.........VZ...h.e.y.>...OI.b..8.}6E.
?...#A.s....)..K...h..?zR;.5.......K............uIc.a..lh.R..Z..;...f...k.pf[<...3obE...O-............4....E..|*.L.\[+...+.^...KM...oX........R..B..U\..1.).SW..S....Rh.0C.......I............-L....7.`L+)C......J..g.\z..e/.....]..|..>......W...-sqBPpo.N...^@....q.>.....5.D0,.,( ..1.(s....'..a\...~.f.i.o..).WM^...U(g.{..#.{.Vm.......|....@.l%.2_d.?$.........)..L+).'.p.:...|.vg..B.w).w.k".^..Y......f.)#..x/Z.i...H)....=|.].....
0m?F...t$#.e...",..e.f..
.$..G...v..zr.... J.~..N..l.R..z.....DC.~b......>\..`
.....g.>.{J.x.....2....h........1.z..VD..uA2
.k........o=..8.j.v..
..].W.][.0..i...v...h.s.;....4.....A...b.=..(....^....4.F`.P>.-/.'.J...s..x.....oL..:....q.h.Z..!.
1...z|..?.AS.+....tt..>.....k.......i..d...T.AzH.H..c.........x."]..|`..N2.f.[.d..!...2....e....;vw.......Fy.<../....}...C:"..Y..*..x.Z....A..&............fy...V..\[..D..;.......W...<[<.G.X..>.D .`..Q@+.*&.J.. .`.+.t.......K,.....H....$...
=0M'.....{.!...u...U%....q.0.....D.O.leJ$...^#Q..1...2%{..Adv.Q"..pm.P.7&#...?md3..........gv
V...wgUv..?$..Vk=t.u/...1.U.....#.n...b...6..#:...2..|.i.".^V.5.....l..N....R..r.{Y.U........c4.s....P}.-#.t.G.Fr....
..|.(....M.MB.........7.E..i.N...Ip..M.}e.C'.%.w/.8.B...S.j..GH......Q.\.8.......&...q%<....#."....H9i.X........p..........[.s.
C.P.4..Rf.S..w.<...8...&..a...%............

HTTP/1.1 200 OK
Content-Length: 0
Content-Type: application/edifact
Server: Microsoft-IIS/7.5
X-Powered-By: ASP.NET
Date: Fri, 24 Jul 2015 05:26:28 GMT
Connection: close

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 <o:p></o:p>

In BizTalk admin AS2/MDN  status report, the status of MDN is set to Acknowledged-Processed but it appears under Acknowledgement-Rejected filter (because of blank AS2 header).

The HTTP settings for message reception on AS2 Agreement have three options true : Expect 100 continue, Unfold Http headers, keep connection alive

The HTTP settings for MDN on AS2 Agreement have no options selected.

AS2 IDs are correct 

July 27th, 2015 4:13pm

Hi Faizaaustralia,

Please check certificate configured correctly because if the wrong certificate details are configure for an AS2 party, your partner cannot decode/decrypt the message and it might look blank. Please make sure your partner has all the certificate details.

Please refer below related thread for reference,

AS2 Synchronus Empty MDN

Free Windows Admin Tool Kit Click here and download it now
August 30th, 2015 4:40pm

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