AS2 Messages bigger than 1 MB makes a MIC not verified failure

Question

Hi all,

if we receive messages bigger than 1 MB via AS2, the sender get the error "MIC not verified"

(Though UPXI has sent it successfully there have been some problems with regards its message integrity checking.

 

Upon investigation the message is experiencing a "MIC not verified" issue. )

The message itself is correctly processed on our side, but the sender side get everytime an error message.

Now I am not sure if it is a BizTalk problem while generating the MDNs for those messages or if it is a problem on the sender side.
Because this side says http://msdn.microsoft.com/en-us/library/bb226414(BTS.20).aspx messages up to 96 MB could be processed.

Kind regards
Peter

Answer 1

Is the error message being received by the partner's AS2 provider or in an HTTP header from BizTalk? It sounds like an issue related to the partner processing the file.

Thanks,

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If this answers your question, please use the "Answer" button to say so | Ben Cline

Answer 2

I am waiting on an answer of our partner about this point

Answer 3

If there is compression turned on, and this is BTS R2, you may test KB 970075:
http://support.microsoft.com/kb/970075/en-us

Answer 4

Please check if the error doesn't exist when compression is set to OFF. As I know, the issue in KB970075 has been fixed in BizTalk 2009.

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