Pin request

Hi again,
I have a pin in my watch. This because I set my work mail. Doing this, the net admin requests a mandatory pin to lock the phone. So there it is, when I click the watch button I have a pin to insert. My question is: do you know how I can access the pin menu? For example if I want to change it? Or I want to change the delay with which it is requested, I mean that in my phone I can decide that even if I shut down the display and I reactivate it within a minute, I don’t need to insert the pin again…
Let me know, thank you