I am using the following formula to identify duplicate invoice #s in a spreadsheet. I've noticed that the formula does not work when the invoice # starts with a zero. It works for all other formats: text, numbers (without leading zeroes), dates. The column property is set to text/number. What could be the issue??
=IF(COUNTIF([Invoice ID#]:[Invoice ID#], [Invoice ID#]85) > 1, 1, 0)