InstructionGo to: Application Firewall >> Reverse Proxy and click at the top of the Mapping column on the + sign.Choose New from template >> SharePoint, which matches your SharePoint version.A new mapping based upon the template has been created.Go to: Application Firewall >> Reverse ProxyConnect the new SharePoint mapping with the corresponding virtual host.-Corresponding virtual host: sharepoint.ext.virtinc.comConnect the new SharePoint mapping to the corresponding back-end group.The mapping has been established and can be activated.