CMYK images using document profile
This check flags CMYK images that have been placed into InDesign with an attached colour profile and are not set to 'Use Document Default’.
By default when placing CMYK images into InDesign the attached colour profiles are ignored and InDesign document CMYK colour profiles are used instead. This prevents changes to the CMYK colour numbers when outputting to PDF or printing, and so helps maintain consistent colour.
Unless you are intentionally using different CMYK colour profiles, it is recommended that the colour profiles are set to ‘Use Document Default’. If not, you can fix this problem by selecting the image and choosing Object>Image Colour Settings:
For some versions of InDesign you may also want to change the way that image colour profiles are associated when placing CMYK images: using InDesign’s File menu > Place, choose a CMYK image and select ‘Show Import Options’. Click ‘Colour’, then choose the profile option ‘Use Document Default’ and click OK, which sets the default for subsequent placing of CMYK files.
Adobe InDesign Image Placing help
