Hi,
What does QU report as the profile for the image modified by Adobe? You can see what it is in the exif bar below the thumbnails - hover over the thumb, it's the last item in the information. If between asterisks it is embedded.
I suspect Adobe is converting to Adobe RGB.
If you want a larger resolution embedded jpeg, extract in QU by placing image in queue, right click and choose Extract Embedded Images. You can then resize in QU using the conversion feature.
Does you camera produce a reduced size embedded jpeg, most modern cameras have an embedded jpeg the same resolution as the raw image?
Terry

Just  a comment.
Not that familiar with Adobe stuff, but the DNG converter is free, so I tried it.
I converted some raw DNG which I downloaded plus some of my own CR2 files.
They all lost their identity with regard to attracting the matching camera profile
MY Canon CR2 went to adobe .icc also.

I went further in the comments of users of DNG converter, and found many references to the EXIF data being changed/overwritten.
Listen to Terry.
You will get better images ith zero hassle.

Fred

Recent versions of QU will drop the camera profile if it notices that the DNG has been resaved from an Adobe product.  The reason is that I got multiple complaints that DNG's exported from Lightroom had overblown/oversaturated colors.  I looked into the problem and confirmed that Lightroom changes the RGB data in the DNG, making the profile no longer applicable as they convert the RGB data from the raw (as saved) camera format to a smaller color space (it appears to be Adobe RGB).  I confirmed this with my own images by importing raws from multiple cameras into LR, making no changes, and exporting DNG files: the resulting DNG files had the RGB data modified and it was no longer raw RGB data as it came from the camera.  It appears that they convert the raw RGB data to Adobe RGB or they are using an intermediate color space that is then picked up/converted to Adobe RGB by DCRAW upon developing.  At that point, the best I can do is deactivate the custom camera profile in QU (if the camera has one) and let DCRAW do the conversion based on Adobe RGB: which DCRAW uses internally.

I have not confirmed the reason for LR altering the RGB data: I guess that may be valid for saving a DNG since RGB values are always relative to some color space.  Just don't expect DCRAW to be able to get the original RGB data back to the point that you can apply one of QU's custom ICC profiles anymore.  The custom camera profiles are only valid for raws directly from the camera card: that's just the way it is.  You should still get reasonably accurate color as the QU custom profiles usually make only subtle changes to color accuracy.  Admittedly, DCRAW can be a bit finicky about opening/reading raws that have been altered by other software.  It's always best to feed the original raws from the camera to software that uses DCRAW for raw developing to be safe.

Regards,
Mike

I've not found a single case where LR saves the original RGB data: it always converts it even when the camera itself saves as DNG.  If you could send me a link to one that you think wasn't altered (via color space), please put it somewhere like Google Drive and send me a link.  Maybe I can find a tag in the file that would allow me to switch.  That said, for now...

QU can assign any profile you like:

(1) Select the raw thumb(s) for your converted DNG's.
(2) Right click on one of the selected thumbs and select "Custom Filter".
(3) Click the button next to ICC override and select your camera's profile from \programdata\ddisoftware\qimage\profiles

You could even save that filter with a name like "Raw Camera Profile" and then all you'd have to do in the future is right click on thumbs and select "Predefined Filter" and select that filter.

Mike

Problem has been fixed with new version v2016.153.

Thanks a lot!