The Data Integrator template for Project Expense Estimates uses a field named Billing Type. This field is located on the CE entity Estimate Line.
When adding a new Expense Estimate in PSA, this field is not filled with a value. The client needs to use this field in order to get the correct data in UO.
The field msdyn_billingtype is not displayed in PSA, so the user can’t fill it in and therefore the field is always empty.