Determines the EcoSys Invoice Line Items Resource name that transfers the Invoice Line Items from Smart Materials to EcoSys.
Sample format: {EcoSys API name}/?{EcoSys parameter}={ZI_E_PROJ}
Example: InvoiceDetails/?RootCostOBject={ZI_E_PROJ}
The project default value is appended to ZI_E_SURL value to form a valid ECoSys API.