If Knox gets tripped the phone warranty goes down the toilet.
You can see this only in download mode.
Knox will have a value of 1 if the phone has been fiddled with in any way. Even an Odin flash of stock firmware can trigger Knox to 1.
My Galaxy J5 was upgraded from 6.0 to 7.0 using Odin and it triggered Knox. I was using official firmware, no root, no custom recovery, only stock.
You can see this only in download mode.
Knox will have a value of 1 if the phone has been fiddled with in any way. Even an Odin flash of stock firmware can trigger Knox to 1.
My Galaxy J5 was upgraded from 6.0 to 7.0 using Odin and it triggered Knox. I was using official firmware, no root, no custom recovery, only stock.