If the device is powered OFF, it won’t be able to communicate with the Knox E-FOTA Advanced server and the update will not download.
The update remains pending on the Knox E-FOTA Advanced admin console until the device is turned ON. Once the device is ON, it receives an update command based on the campaign’s original parameters. The update applies as long as the campaign is still active.
Note that the device only receives the update if it is powered on during the campaign's allowed upgrade window. If the campaign period is over, the device cannot receive the update command.