The system directs requests to internal servers through its internet networking setup.
The system directs requests to internal servers through its internet networking setup.
Exchange Server identifies requests from the intranet by checking the origin of the connection. When a user types the URL https://remote.companydomain.com/owa, it appears to be external, but in reality, the system is configured to route such requests through the internal intranet network. This ensures security and proper authentication. The same applies when using remote.companydomain.com/owa—it directs the traffic via the internet before reaching the Exchange Server. This setup prevents unauthorized access from outside while allowing internal users to interact with the server seamlessly.
If you want clients to access your CAS server you'd need to set up client Access role when installing Exchange. In the installation process, the wizard will ask you if you want your clients to access OWA from the internet. Most URLs like, mail.domain.com/OWA or webmail.domain.com/OWA. There is something called outlook anywhere. Which will allow the user to connect the exchange server without having to connect to the network via a VPN. Also, for everything to work you need to setup DNS records and configure your server to accept emails. Here is a diagram of my network: