Hello
I am on 4.3 [Rooted] with Knox 0x0, System status shows: Custom how do I change it to official without tripping Knox to 0x1?
I resetted to factory defaults because I am going to sell it and propably the next guy would like to update to 4.4 KitKat and I no longer have root, can I run the official update without tripping Knox?
Reroot it without tripping Knox, and Triangle Away.
http://xdaforums.com/galaxy-s2/orig-development/2014-01-15-triangleaway-v3-26-t1494114/
Read extremely carefully.
And if you succeed, buy Chainfire a beer or something.
...you said you were 4.3 rooted without knox.
However, check this http://xdaforums.com/showthread.php?t=2487916 out.