If Developer tab in Microsoft Office is missing, you can add Developer tab in Word, Excel, etc. via Settings, Group Policy, Registry Editor.

Excel provides built-in tools to help you to find discrepancies like Filters, Conditional Formatting, advanced functions (If and IS, VLookUp, etc.), and Add-ins.

How to filter for duplicate records in Excel Perhaps the easiest way to find duplicates is to use Excel’s advanced filter. It’s flexible and can easily find duplicate rows.