A send port that has the "Ordered delivery" option enabled and a backup transport configured stops sending messages in BizTalk Server 2006 or in BizTalk Server 2006 R2

Consider the following scenario:

• A computer is running Microsoft BizTalk Server 2006 or Microsoft BizTalk Server 2006 R2.
• You create a send port.
• In Transport Advanced Options, you enable the Ordered delivery option on the send port.
• You configure a backup transport for this send port.

In this scenario, the send port stops sending messages when the following behavior occurs:

• The primary transport fails.
• The send port tries to use the backup transport.

This issue occurs even though the Stop sending subsequent messages on current message failure option on the send port is enabled or disabled.

This issue occurs because BizTalk Server 2006 does not support configuring a backup transport for a send port that has the Ordered delivery option enabled. Additionally, you cannot use Ordered Delivery together with dynamic send ports. When you create a dynamic send port, the Ordered delivery option is unavailable.

This behavior is by design.

For more information about the restrictions in ordered delivery of messages, visit the following Microsoft Developer Network (MSDN) Web site: