You could use another column and put a formula:

=exact(a2,"aa")
(and drag down the column)

And filter on that for Trues/falses.

If you're doing the equivalent of Contains, you could use another formula:

=isnumber(find("aa",a2))
to look for aa

Mikey wrote:

In excel 2003 when using the auto filter, the filter does not recognize the
case of letters. For example AA, Aa and aa would be considered the same.

Is there currently a method to overcome this problem or can one be added?

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Dave Peterson