Is it possible to add an error box in Data Validation when a Cell is being edited? I managed to do so but it wont pop up when im deleting the value or copy paste, it wont show up, It just shows up when I type in a cell and change it. Is this also possible ? In the attached file I applied to this all the columns (A:M) but I can still delete it or copy paste it. How do I make this error box? Thanks.
Errorbox.xlsx
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