You can schedule appointments, tasks, and reminder notes for yourself and other users. If you want to find out whether someone accepted a task or is coming to your meeting, you can check for an accepted or declined status in the item's Properties.
Use appointments to schedule blocks of time on a specific date. The duration of an appointment can be in minutes or hours.
You can use Busy Search to check for a time when all the users and resources you want for an appointment are available.
A task is an item to be completed by a specific date and time. When you assign a task to a user, the user can accept or decline the task, but until it is declined or completed, the task appears on the user's Tasks List each day.
After it is accepted, a task appears on the Calendar on its start date. When you mark a task Completed, it no longer carries over to the next day on your Calendar.
Reminder notes are like mail messages except they are scheduled for a particular day and appear on the Calendar for that date. You can use reminder notes to show vacations, holidays, paydays, birthdays, and so forth.