Proxy server
If you use a proxy server between your Exchange Server with the Client Access Server (CAS) role and the Exchange Server where ESET Mail Security is installed, specify the parameters of your proxy server. This is required because ESET Mail Security connects to Exchange Web Services (EWS) API via HTTP/HTTPS. Otherwise, quarantine mailbox and Microsoft Exchange quarantine will not work.
Proxy server
Type the IP address or name of the proxy server you use.
Port
Type the port number of the proxy server.
Username, Password
Type credentials if your proxy server requires authentication.