Why some BizTalk artifacts can be Enlisted and Started and others can only be Enabled? What kind of errors depends on these actions (Enlisted, Started, Enabled)? One of the main rule of the BizTalk message system is: Only messages with subscription can come to the message system. System cannot "consume" messages without subscription, otherwise they would overfill it (messages without subscription would come into the message system but could not go out, noone want them.) There are two places where ......