With the XML Sitemap module installed, you will noticed that when at first you run the rebuilding process it only include a few links. This isn’t an issue with the XML Sitemap module. It is because after the module installation, you will need to also tell the module which contents to include or exclude. And to do this, you will need to go to the ‘Admin/Content Management/Content Types/Page/XMLSitemap/’ section and change the inclusion option.