Policy - Lock before user preferences

Good morning,

I have a question about policies (they are new to me)

Policies are installed.

I see in the notes client that in front of some user preferences there is a lock.

So the user cannot change the setting.

How can I remove this lock? Disabling the policy in Desktop Settings does not remove the lock icon.

And how can I set a default value for a user preference? Ex : I want the default value for right click and closing a window checked as default.

Thanks in advance

Greetings

Alain Janquart