Use the Unplanned Service Outage dialog box to specify
how you want to handle incoming messages in the event that a
service experiences a failure. As the name suggests, an unplanned
outage is unexpected and might occur due to power failure, hardware
failure, network problems, and similar situations.
To put a service into unplanned outage mode
In the console tree, right-click the service that you want to
put into outage mode. This opens the context menu.
Select All TasksSet unplanned outageOn. The Unplanned Service Outage dialog box
opens.
Select one of the following options:
Select Delete to remove any incoming messages during the
outage.
Select Acknowledge to place the messages in the
acknowledged messages browser for later consideration.
Click the check box to also put all subservices into
maintenance mode.
Click OK to confirm your choices and close this dialog
box.