You would like to know whether the field ABC is available in the Data Source XYZ. (ABC represents the field name and XYZ is the Data Source name)
SAP Business ByDesign
You can refer to the Data Sources Documentation PDF file under Application Help in the below document. This document will get upgraded each time when system upgrades.
KBA 1830749 - Complete Data Sources and Characteristics Documentation
Field not found in report; Field missing in report; Field Missing; Unable to find field in data source; , KBA , SRD-CRM-ORD , Orders & Contracts , Problem