Milestone Alert Scheduling 
You can set up a schedule to notify subscribers when an initiative's milestones are coming due.
For example, you can set up an initiative alert to review milestones daily and start notifying users three days before a due date. The Scheduler reviews milestone due dates daily. If the Scheduler finds a milestone due in three days, subscribing users are notified daily starting today, then tomorrow, then the next day (which is the due date). Then the user stops receiving notifications about this initiative's milestone. The user was effectively warned daily for three days before the due date that the milestone is in danger of slipping behind schedule.
Features
You set up a milestone schedule with the following features:
You set the number of days prior to the milestone due date that you want to send out initiatives alerts.
You specify the frequency you want the Scheduler to review initiative due dates.
During a periodic check, if the Scheduler finds an initiative that is due within the notification days, all users who have subscribed to that initiative and who have selected the A milestone will slip behind schedule in x days subscription option in the Home component are notified daily until the due date occurs.
Notifications start on the nth day before the milestone is due and continue daily until the due date.
Activities
To schedule initiative alerts, click Add Task next to the Initiatives Alerts activity, then click Edit and enter schedule information in the available fields.