What happens when the application is in maintenance mode?

When an application is in maintenance mode, you see a message on the UI displaying either the scheduled start time or the estimated completion time of the planned maintenance activity.

During the maintenance period, the background processes and tasks, such as scheduled processes or any report generation activities, are put on hold. Also, the Setup and Maintenance work area is available in a read-only mode. After the maintenance is completed, all modules return to their usual state.