Why does default option sharing OneDrive for Business docs now give link anyone can use to edit?

Sure. In the old sharing dialog, you can copy a restricted link but it assumes you already know who has access and that the person you want to send it to has access. In the new dialogue, we want to make sure that when a user copies or e-mails a link, the recipients will have access. So when the user "copies" a restricted link, we also give them the option to permission new users to the resource. Hope that helps!

Stephen Rice

OneDrive Program Manager II