Consider the following scenario:
- You use a dynamic send port to send AS2 messages in Microsoft BizTalk Server 2010.
- You specify the Receipt-Delivery-Option header for incoming AS2 messages.
- You process lots of AS2 messages.
This issue occurs because there is a code defect in ASDecoder component when multiple instances are changing the same Protocol Settings object, and there are different values of Async MDN URI in incoming messages.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.