Mobile server (explained)
The mobile server is responsible for giving XProtect Mobile client and XProtect Web Client users access to the system.
In addition to acting as a system gateway for the two clients, the mobile server can transcode video, since the original camera video stream in many cases are too large to fit the bandwidth available for the client users.
If you are performing a Distributed or Custom installation, Milestone recommends that you install the mobile server on a dedicated server.