Adobe Camera Raw and Adobe Photoshop Lightroom offer standard support for all Canon 5D Mark IV CR2 files. Please note that Canon’s Digital Photo Professional software is required for users that want to take advantage of Canon’s new Dual Pixel raw adjustments.
When using Lightroom 6.7, Canon CR2 files generated with Dual Pixel Raw enabled require the 'Embed Original Raw File' option be selected when converting to DNG. For this reason, converting to DNG on import in Lightroom 6.7 is disabled for Canon Dual Pixel Raw files. This limitation does not apply to Lightroom 6.8 or later.
Lightroom 6.7 supports conversion of Canon DPR files to DNG when you use the lossy compression option. The original image data is not preserved in this case.