A server administrator can place an RPI server into ‘Maintenance Mode’ – scheduled downtime that allows for system maintenance (e.g. a version upgrade) to be performed.
If you attempt to sign into RPI when in maintenance mode, a message is displayed at the Sign in dialog:
Note that the maintenance mode message is configurable and can be set by a server administrator.
If you happen to be working in the RPI client when the server enters maintenance mode, a dialog is displayed advising of this fact. Changes to any files you are working on will be lost when you click OK, at which point the RPI client is shut down.