Mark duplicate with cell linking
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Nicole Hodges
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HERE is some info on Cross Sheet References.
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You could try a formula that would look similar to this...
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=CONTAINS([Column Name]@row, {Other Sheet Range})
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@{Other Sheet Range} would be a cross sheet reference that contains all of the columns you want to search. The formula would check the box if the data in [Column Name]@row is in any cell within that range.