Try this:

Custom, and enter this formula:

=AND(LEN(A1)=5,ISERR(SEARCH("o",A1)))

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HTH,

RD

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"jhicsupt" wrote in message
...
Is there a way in data validation not to allow the letter "O" to be
contained? Also I need it to be no more than 5 characters and/or numbers.

This is an employee number that is 5 characters, but never contains the
letter "O". I do not want the user to mistakedly type in "O". I need it
to
prompt that they must use the number "0".

Thanks in advance.