You can use conditional formating, with a formula like this:
=(MATCH(A2,$B$2:$B$4,0)>0)
It will be true if the value on cell A2 is present in the list in B2:B4.
This can be applied to cell A2 and then copy format to the other cells.

"sharif.boru@gmail.com" wrote:

> I have two columns A & B. I need to first check if the Value in Column
> B exists in Column A if yes then Highlight the Value in Column A.
>
> So...
>
> Name1 Name2
> Dude Harry
> Joe Sally
> Bob Joe
>
> Result:
> the cell with Joe in Name1(ColumnA) should be Highlighted.
>
>