How do I give Active Directory users the Editor privilege

I have my site configured for mixed-mode authentication and am using LDAP to authenticate my content editors. The users can log in successfully and their roles are imported from Active Directory as well. However, their privilege level is none, so new users can log in but are given a message:Access Denied You're not a content editor and you cannot use administration How do I get new users to have a privilege level of Editor so they can edit pages? I've configured permissions for the roles and assigned UI personalization based on roles, but need to get them to the dashboard first.