Originally Posted by mannok
Will KNOX reset to 0 if I unroot and flash factory rom?
Knox can be reset but only under specific experimental conditions thus far. Nothing that you will be able to make use of on your phone anytime soon. For all practical purposes you have to consider Knox irreversible.
There are hundreds of threads about this, so you can't have read (m)any of the existing threads yet. There is a wealth of information there that you can read to gain a better working knowledge of what the Knox flag does..