FYI, I just beat all six scenarios once on NOVICE and still cannot use max settings. I have 244 officers, and can't get the rest of them.
UPDATE: As the almighty google suggested, I spent 2 hours clearing Yellow Turban on easy, and still NO max setting.
I ended up just cycling through every single officer using "Hire-wide" and got it without the setting. You just keep releasing officers when you have 98/100 and hire ones that don't have "get" because as long as they sit in your army for one second, they count.