I am so curious to know who are those two companies. And I can imagine it is not easy to meet their requirements. I can imagine there are issues on authenticati

I am so curious to know who are those two companies. And I can imagine it is not easy to meet their requirements. I can imagine there are issues on authentication, security, access to data system, resolution conflict orders, consistent inventory accounting. Those topic are not rocking science but to do them well and make the system reliable (even just meet the requirements) is not a trivial task.