As admin set a site policy url. Log in as a student. Accept the policy. Verify that the messaging and notifications icons have appeared and you can use them as expected. Log in as the admin and confirm you are not asked to confirm to the site policy and the messaging icons are present. Unset the site policy url. Log in as another user who has not agreed to the site policy you set earlier. Verify the user does not have to agree to the site policy. Verify that the messaging and notifications icons are present and you can use them as expected.