Even when there is no Hot-Standby configuration, there is a control over the Remote Domain connection between Client and Server E3 Servers. This connection uses the REC protocol, the same one used between E3 Server, E3 Viewer, and E3 Studio. Therefore, a REC connection port and its possible firewall configurations also apply to Remote Domains.

Once connection is established, there must be a Domain executing. In this process, a connection is reestablished whenever a problem occurs. After finding the Domain executing, its correct name is checked, as well as the user login (if necessary).

Similar to what happens with E3 Studio's and E3 Viewer's REC connections, communication statistics of Remote Domain connections can be viewed on E3 Server's Statistics window, available via E3 Admin icon on Windows Notification Area.