Thanks for your inquiry. We will appreciate it if you please share your input and output documents here. We will look into the issue and will guide you accordingly.
However it is a document with a color logo and when savef as greyscale the logo is still cmyk rich black. The fonts and everything else is black/greyscale. We are trying to convert to black from color where the customers printing will be cheaper.
Thanks for your feedback. I am afraid we can not suggest you any thing without replicating the issue at our end. We will appreciate it if you please share your document via a private message. We will look into it and will guide you accordingly.
Thanks for sharing the source document. We have noticed that Adobe Preflight recognize logo color space as DeviceRGB color space, so logged a ticket WORDSNET-15552 in our issue tracking system for further investigation and rectification. We will keep you updated about the issue resolution progress within this forum thread.