In Telligent Evolution 5.6, the group drop-down became word wheel search field. For example, if you type "Group" in the field, you see the list of forums beginning with "Group."
You can set the roles and permissions properties for your forum on the Permissions page. The Permissions page is available only in the forum editing functionality.
You can add an unlimited number of forums to groups or to the forum site root and control user activity by assigning permissions to the user roles. Some privileges are obviously designed for administrators, such as the edit forum settings privilege (which requires access to the Control Panel) and editing posts from others (which you probably want to restrict to administrators). Other settings are designed for more general users, such as privileges for reading and commenting on forums. For privileges such as creating new threads, you will have to decide whether to make them available to all users or only administrators, or whether you want to create customized roles to control those privileges.
To set forum permissions:
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