What is a key limitation of outbound messages when sending order information to an ERP system?

A key limitation of outbound messages when sending order information to an ERP system is that they do not support multiple objects. This means that when an outbound message is triggered, it can only send information related to a single record at a time. In many integration scenarios, especially those involving complex order processing, there may be a need to send details involving multiple related records or objects, such as line items linked to an order. The inability to bundle these related pieces of information into one outbound message can require additional handling or custom development, complicating the integration process and potentially leading to difficulties in maintaining data integrity across systems.

In contrast, the other listed options do not accurately represent the capabilities or typical limitations of outbound messages. While there may be approaches to add security or ensure reliability, outbound messages specifically face the challenge of being limited to a single object, which can impede efficient integration when dealing with comprehensive datasets typically found in order management.