Preserve the original before preparing a report
An XLS file can contain formulas, formatting, multiple worksheets, named ranges, and older workbook features. The PDF is a page view of selected content, not a complete archive of those editing structures. Keep the original in the required records location before making a distribution copy.
If the workbook is being migrated, record its source name and reporting period. Avoid overwriting the legacy file with a PDF-only replacement when formulas or links may be needed later. The page copy serves readers who need a stable report, while the spreadsheet remains the source for recalculation and revision.