Allows you to verify that the Output Intent is present and valid according to the selected PDF/X standard.
According to the PDF/X standards, a PDF document must contain information on the intended output. The output intent identifies what the final output destination of the document is, enabling everybody involved in the workflow to take the output intent into account. For example, a color proof may take into account the type of paper on which the document will be printed.
If the output intent of a PDF is not valid according to the PDF/X standards, the fix depends on the problem: