Use Archive to save mail or phone messages, appointments, reminder notes, or tasks to a designated database on a local drive. Archiving items saves network space and keeps your Mailbox uncluttered. It also protects items from being automatically deleted.
You can view archived items whenever you need to. You can also unarchive any archived item. When you archive an item you have sent, you cannot track the status of that item.
The system administrator might specify that your items are archived automatically on a regular basis.