If you are using Outlook on PC read the Knowledge Base article How Does Outlook Archiving Works? for more information. Archiving is available when you enable the rule which is set up and run in your mailbox. The Archiving rule will help you move the data from the server to a folder on your computer to reduce the mailbox size. In this article, you will find the instructions on how to archive mailbox data in Outlook 2011 and Outlook 2016 for Mac.