PivotField.SourceCaption (Excel)
The SourceCaption property is applicable only for OLAP PivotTables, and returns the original caption from the OLAP server for a PivotField.
You can use the Name or SourceName properties for non-OLAP PivotTables.
Dim strSourceCaption As String
strSourceCaption = ActiveCell.PivotField.SourceCaption