Decide, in which case and when the notification will be sent to the resources. InLoox PM allows you to define the period of the notification: immediatly, in advance or in some day(s).
Open the InLoox PM options.
For more information, about where to find the InLoox PM options, please see Open the InLoox PM options.
Click Planning in the navigation pane and then click Notification Details. Below you see the Notifications Details area.
Select the check box Enable prenotification to define in how many days the notification will be sent.