Call Queue Button

We have poly edge e350 phones

If your users have the mobile app, they will be able to toggle off the “Accept queue calls” button there.
Your users can also do this on a browser, by logging in https://service.ringcentral.com and clicking on their profile pic

If you want to disable queue calls on the phone you can do so by setting it to Do Not Disturb (DND).
This comes with the caveat that you won’t be getting direct calls as well if you are on DND