Integrating two systems in a two-way fashion has a lot of nuanced challenges.
You have to consider the data structures of both systems, where the trigger points in each system reside, the state machines of the data structures in both systems, and how these state machines operate with one another and which system is the source of truth for data.
But the main challenges lie within the security and data integrity between the two systems. Next we'll explore why this is so important.