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