Consider the following scenario:
You install Microsoft BizTalk Server 2010 on a computer that is running one of the following operating systems:
Windows 7 Service Pack 1 (SP1)
Windows Server 2008 R2
Windows Server 2008 R2 Service Pack 1 (SP1)
You use the AS2 Decoder to decrypt an encrypted message that is larger than 5 megabytes (MB).
In this scenario, the AS2 Decoder cannot decode the message.
This issue occurs because of a known issue in the CryptMsgUpdate function.
To resolve this issue, apply the hotfix that is described in Microsoft Knowledge Base (KB) article 2480994.
For more information about BizTalk hotfixes, click the following article number to view the article in the Microsoft Knowledge Base:
2480994 "ASN1 out of memory" error when the CryptMsgUpdate function decodes a message that is larger than 5 MB in Windows 7 or in Windows Server 2008 R2
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
For more information about AS2 receive components, visit the following Microsoft Developer Network (MSDN) website:
General information about AS2 receive components For more information BizTalk Server hotfixes, click the following article number to view the article in the Microsoft Knowledge Base:
2003907 Information on BizTalk Server hotfixes