Adobe conversions can correct for lateral CA if that option is turned on by default, but you have to use manually-applied defringing to get rid of axial CA and other fringing.
Without knowing what your Adobe defaults are for the camera it’s hard to know if you could improve on what you’re seeing in Adobe products, automatically or not.
Used Adobe converter 184.108.40.206 and got Cyan and Magenta abberations on all high contrast edges. NEF files were from a Nikon D7100 and look great using ViewNX 2 software. Is there a better converter?
I'm not sure I understand what you are doing. DNG Converter just converts file format from NEF to DNG. It doesn't do any rendering, so it won't have any effect on chromatic aberration.
You are comparing apples and oranges. ViewNX is rendering the Raw file as a processed image.
The fringes will be present in the NEF file, but ViewNX will be automatically correcting them. Camera Raw/Lightroom will also correct them.
The main issue or discrepancy is the idea of default settings. By default, Nikon's software performs chromatic aberration for Nikon's raw files. Camera Raw and Lightroom do not. As Steve noted above, you can perform these corrections in ACR/Lr. However, they don't happen by default.
If you are seeing CA in the default rendering in ACR/Lr, then most likely the CA actually exists in the raw capture (data) itself.
The DNG Converter embeds a thumbnail and preview in the DNG that are rendered with whatever the Camera Raw defaults are set to do for the camera the DNGs are from, which if CA is automatically being removed by default, then the preview should have it removed, otherwise it won't. Again, we'd need to understand what Adobe defaults are in effect for the camera when the DNGs are opened in the Camera Raw plug-in before understanding if this is a CA-no-on-by-default issue or a CA is not the type that can be corrected by the Adobe engine.
The Nikon engine might easily be masking narrow fringes of color by over-aggressive sharpening or via some automatic fringe-removal.
If the OP would post an example photo that exhibits the fringing, then others could test and comment on what can be done or not done to mitigate the issue in Adobe products.
Yes!!! I mean, no, I was not aware of that. Thank you!!!! Much better!