I thought it was case sensitive, but it is not working that way for me.

"Basil" wrote:
You could just select the 'List' option and type Y,N in the criteria. It is
case sensitive.

"Lakeville" wrote:

I want to ensure that the data in a cell is either a capitalized Y or a
capitalized N. I understand how to do the data validation of a list with Y &
N. And I understand how to enforce capitalization: =EXACT(A1,UPPER(A1)).
However, I don't understand how to enforce both for the same cell.