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Last tested: Dec 24, 2019
An admin user will see a "Manage Access" option when viewing the folder. However, we can't manually specify which groups/users have access to this folder. This is defined in an SSO embed script.
When an embed user is given access to the embed groups folder via an SSO external_group_id, they will be given Manage Access / Edit permission on that folder by default. At that point, an Admin user can Manage Access on the folder for that group and change the access level to View for that specific group. Then, the next time the user logs in, they will not have the option to save or edit content in their group folder: