Excel 2010: Highlight a Duplicate Cell Value in another Column

Hello Experts -

     What would be the best formula to use in order to Highlight let's say a value in Column A and run it against Column D to see if that same value exist there.  If it does, highlight both values?  Thanks for your help!
itsmevicAsked:
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ProfessorJimJamCommented:
Select both columns then go to conditional formatting and select highlight duplicates
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Glenn RayExcel VBA DeveloperCommented:
Only problem with using conditional formatting as above is that duplicate values within a single column will also be highlighted, even if there is no match in the other column.

However, a couple of conditional formatting rules applied to each column can resolve this.

For the cells in column A, you'll have a rule like this:
=COUNTIF(D:D,A2)>=1
and for those cells in column D:
=COUNTIF(A:A,D2)>=1

This will highlight only values that are duplicated in the other column.  See the example workbook.

Regards,
-Glenn
EE-CF-DuplicateValues.xlsx
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itsmevicAuthor Commented:
Thank you!
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