Rule precedence is determined by increasing trigger percentages.
The highest applicable threshold is used to generate a notification. The time and the rule’s threshold are recorded.
If users move into a higher threshold since their last quota notification, a new notification will be delivered based on the current set of applicable rules. This notice can be immediately delivered to any user whose space usage is steadily increasing.
If usage drops, the notification interval of the current rule (lower threshold) will be used to check the time elapsed since the last notice.
The stored time and threshold for the user will be reset to zero if the user’s mailbox size falls below all of the defined thresholds.