Restore official firmware and recovery

[Potbellypig]

I need to give my Galaxy Note 12.2 Wifi sm-p9000zkvxar to someone else and would like to restore it to the official configuration. I understand I tripped Knox already. Restoring factory defaults wouldn't replace the recovery, would it? Please let me know what I have to do.

 

[Beut]

Flash the stock firmware and bootloader will restore it to official status but Knox status won't change back to zero

https://xdaforums.com/showpost.php?p=62574218&postcount=3

This is an example of a rooted tablet, its status change from custom to official after flashing the stock firmware.
The SM-P600 is the smaller tablet but similar to SM-P900.