These settings are in Indesign.Go to ‘Edit’>then ‘Color Settings’

First export setting

Additional InDesign Setting to Check

InDesign CMYK / Ink Density and PDF export settings

Settings during the PDF export process.

Additional Information:All color images or created colors in InDesign must be in CMYK mode.

Color photos should be 300 dpi for best printing quality. 200 dpi is acceptable.

Black and white photos/images should be in grayscale mode and 175 dpi.