Specifies the member of the mail merge data source.
A String value specifying the data member name.
Set the MailMergeDataMember property of the mail merge template workbook after assigning a dataset that contains multiple data tables to the IWorkbook.MailMergeDataSource property. See the How to: Perform a Mail Merge example.
The MailMergeDataMember property is irrelevant when the mail merge data source is a data table or a data view.