No, but it's possible to export a grayscale PDF from a color file.
I looked into that method, but did not find the path. Could you give me a clue as to where that option is?
File > Export > Adobe PDF (Print). You must choose the proper PDF preset. Choose High Quality Print, Press Quality or PDF/X-4. Go to Output > Color Conversion > Convert to Destination. From the Destination menu choose a gray profile like the Gray Gamma or Dot Gain options.
Perfect - thanks