The functionality to send messages to nodes can also be found in: Backoffice -> Dispatch: left frame.
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At any time it is possible to send a message to a particulair node. For example, a planner can send a message to the drivers sms-phone or PDA as well as an email address. Note: The message is sent to the dispatch node, so the correct address inside the driverscreen for dispatchnodes should be filled, see: modifying nodes.
Select the node(s) and click the [msg] button. Type message and press [send].