Hmm...we can't find this setting yet, but we'll keep checking. Feel free to contact us for help.
Looks like you're signed in with a Gmail account. Please try again with your account that you use to access Google Admin.
Setting the policy to 1 lets websites display desktop notifications. Setting the policy to 2 denies desktop notifications.
Leaving it unset means AskNotifications applies, but users can change this setting.