Outbound Rules Manager
The “Outbound Rules Manager” provides an interface for creating custom outbound rules that will be imported into the site’s web.config.
Outbound rewrite rules modify HTTP responses. For example, if your Web site’s navigation structure has changed, you can create an outbound rule that modifies the URLs in your content so that the content of your Web pages points to the correct locations. You can then create inbound rules that redirect client requests that are based on cached locations to the new URLs.