The AD Explorer tab provides you the windows explorer view of the active directory objects of the selected domain. While left tree lists all the active directory objects, the right panel displays the properties, security permissions, and the mailbox rights to the selected object in the tree.
Properties: This will list out all the below properties of the specified object.
Security permissions: This will list out all the permissions of the object with security principal and the scope of its application.
Mailbox rights: This will display all the users and their rights over a selected user's mailbox.