To See the Active Security Settings of a Folder, Using the Folder Properties Dialog

Select a folder.
Select Folder > Properties.
On the Folder Properties dialog, select the Security tab.
Set Security Type to Real (Workflow & Folder).
The users, groups, and/or access lists who currently have security settings in effect for this folder are displayed.
Select a user, group, or access list to view their the active permissions in the Permissions list.