Ok
I agree that each module must be responsable of own data but how can I solve the simplest problem I need to show the own data module with owner user name for example. I think this challange is quite often in a lot of case.
In single DB architecture I can add to EF the same table in that way I can achive the result the only problem/pitfall can be that POCO class must be shared but in 2 different DB arch how can I solve it? I my case if I store data for E-Comm module on MongoDb the only way is store all user data in the collaction for example but if my user update some data (es name or email) I need to brodcast this update to all module that has stored data in place of link it.
I try to understand how can I create a module where I need access data came from another.
Suppose to have a CRM module and E-Comm module. In CRM I create / admin customer on E-Com need to access to that data.
My question is realated to: