Supported Project Server 2007 extranet topologies Updated: 2006-11-16 In this article: Supported extranet topologies Extranet user scenarios Extranet considerations Using alternate access mapping (URL mapping) Configuring alternate access mappingAlternate access mapping is a Windows SharePoint Services 3.0 feature that is configured in the SharePoint Central Administration Web site. In Central Administration, go to the Operations page and in the Global Configuration section, click Alternate access mappings. On the Alternate Access Mappings page, click Show All and select Change Alternate Access Mapping Collection. Choose the Web application for which you want to modify the alternate access mapping. For example, in the case of adding a new front-end Web server to scale out a small farm configuration, it would be the Web application on which Project Web Access is configured. Click Edit Public URLs. This opens the Edit Outbound Zone URLs page, which lists public URLs for all zones for thi