The dual-write core solution
The Common Data Service can connect to Finance and Operations apps
The Finance and Operations apps can connect to the Common Data Service
Apps in tenant
The dual-write registration and runtime plugins
"The reason for that is because the dual write technology is tightly coupled, Synchronous engine and what that means is that the data or the integration have a direct connection between the two system. So for example, FinOps when it needs to send data, it send the data to CDS using direct connection. What you need to do is to create some application users on each application side to allow those incoming connections."
1. One application user is for incoming connections from the data integrator side2. One is for incoming connection from my CDS instance