Determines the name of the EcoSys Requisition Header Resource that transfers Requisition Header from Smart Materials to EcoSys.
Sample format:{EcoSys API name}/?{EcoSys parameter}={ZI_E_PROJ}
Example: RequisitionHeader/?RootCostObject={ZI_E_PROJ}
The project default value is appended to ZI_E_SURL value to form a valid EcoSys API.