Relativity's redaction tool can transfer the redactions made in one Excel file to Excel files which have duplicate hash values. In order to initiate the propagation process, it's necessary to create two saved searches - one with the Excel files that have been redacted, and another with the Excel files to which the redactions are to be transferred.
When a new redaction project is created, there will be a spreadsheet propagation option.
The field containing the hash value for the Excel files must be selected as the 'Duplicate Identifier'. A markup set must also be selected.
The Redact Spreadsheet Markup Navigator can be used to find where discrepancies between two files appear.