DOCS-2339: edits to structure

Author: Sam Kleinman

source/tutorial/enable-authentication.txt

@@ -4,6 +4,9 @@ Enable Authentication
 
 .. default-domain:: mongodb
 
+Overview
+--------
+
 Enable authentication using the :setting:`auth` or :setting:`keyFile`
 settings. Use :setting:`auth` for standalone instances, and
 :setting:`keyFile` with :term:`replica sets <replica set>` and
@@ -15,8 +18,6 @@ Authentication requires at least one administrator user in the
 ``admin`` database. You can create the user before enabling
 authentication or after enabling authentication.
 
-.. seealso:: :doc:`/tutorial/control-access-to-mongodb-with-kerberos-authentication`.
-
 Procedures
 ----------
 
@@ -49,7 +50,7 @@ Enable Authentication and then Create Administrator
    :doc:`/tutorial/add-user-administrator`.
 
 Query Authenticated Users
--------------------------
+~~~~~~~~~~~~~~~~~~~~~~~~~
 
 If you have the :authrole:`userAdmin` or
 :authrole:`userAdminAnyDatabase` role on a database, you can query
@@ -59,3 +60,8 @@ authenticated users in that database with the following operation:
 
    db.system.users.find()
 
+Further Reading
+---------------
+
+- :doc:`/tutorial/control-access-to-mongodb-with-kerberos-authentication`.
+- :doc:`/tutorial/configure-ldap-sasl-authentication`.