SharePoint Server Standard has been successfully upgraded to SharePoint Server Enterprise. Some of the changes require IIS ...

SharePoint Server Standard has been successfully upgraded to SharePoint Server Enterprise.  Some of the changes require IIS to be restarted on each Web Front End server.  

To make these features available to all existing sites, click OK to proceed to the 'Enable Features on existing sites' page.

If you do not wish to make these features available to existing sites now, you can enable them at any time using the 'Enable features on existing sites' link on the Upgrade and Migration page in the Central Administration site.