In order to open the dialog for configuring the application's offline operation parameters, go to the Preferences pane and in the section, click the . The settings dialog pane opens on the screen..
Select to monitor the status of the network connection and automatically select the offline mode.
Select the network connection status at startup based on the following options:
•Use the previous online state
•Ask me for online status
Select the mode for sending unsent messages when connecting based on the following options:
Select the message download mode when using offline mode: