Merge pull request #2192 from ahardin-rh/overview-roles

Bug 1280415, added role assignment information to the Overview

install_config/configuring_authentication.adoc

@@ -21,7 +21,7 @@ access tokens] to authenticate themselves to the API.
 
 As an administrator, you can configure OAuth using the
 link:../install_config/master_node_configuration.html[master configuration file] to specify an
-link:#identity-providers[identity provider]. If you installed OpenShift using
+link:#identity-providers[identity provider]. If you installed {product-title} using
 the
 ifdef::openshift-enterprise[]
 link:../install_config/install/quick_install.html[Quick Installation] or
@@ -49,6 +49,12 @@ link:#token-options[token], link:#grant-options[grant], or
 link:#session-options[session options], you must run the master from a
 configuration file.
 
+[NOTE]
+====
+xref:../architecture/additional_concepts/authorization.adoc#roles[Roles] need
+to be assigned to administer the setup with an external user.
+====
+
 [[identity-providers]]
 
 == Identity Providers