As with the R/3 destinations, new queues are selected from a list of available queues. The queue is used as a temporary storage place for IDocs that are sent by an SAP R/3 system. BizTalk Server then retrieves the IDoc from a MSMQ Queue.
To select a Message queue
Click the arrow to move it to the Selected MSMQ Queues section. Clicking the arrow moves all available queues to the Selected Queues section.