Similarly I can go to Tools > Print Production > Convert Colors and select Conversion Profile to Gray Gamma 2.2, however that still will produce grayscale, but not monochrome. of AutoCAD, settings in the Options command govern which plot style.
I can go to Tools > Print Production > Preflight > PDF Fixups > Convert to grayscale, which will convert to grayscale, but not to monochrome. If you want to add or delete plot styles from your STB file, this color-mapping. It seems like this should be really simple to do in Adobe. If I increase the resolution, then it sometimes will say that the image is too big and in cannot save/export the image. I've also tried exporting the PDF to a raster format like TIFF but the resolution is really bad for engineering drawings. I've tried importing into my CAD tool, however all the fonts are different. I do not have AutoCAD and use ProE/Creo instead.
I've tried using custom Color Plot Styles (monochrome.ctb) and Named Plot Styles (monochrome.stb), but since I did not create the original AutoCAD DWG (it is 10 years old from 2004), they are not the correct plot style files. Furthermore, how do I load a CTB plot style in AutoCAD To open the folder where AutoCAD looks for plot style files, on the command line in the program, type STYLESMANAGER. I've tried outputing the color PDF to a post script file, however that is still in color. In the Plot Style Table Editor, Form View tab, click the Color field for the plot style you want to change. I am also having trouble with converting AutoCAD DWG to Adobe PDF.