Outlook automatically creates a set of default folders labeled On Your Computer. A bulk move of information via Exporting and Importing may be preferred if you want to store items from an account that is being disabled.
Instructions below will help you view the On My Computer folders, manually move messages, and set up archiving to automatically move old messages in Outlook 20. To do this, include the Microsoft User Data folder within your Documents folder when backing up your Mac. Be sure to back up messages stored on your computer in case Outlook crashes.Items moved to On My Computer folders will not appear in Web Outlook or when accessing your email on a different computer or mobile device, however you can manually move or copy them back if needed.This stores them on the Mac's hard drive while still allowing them to be viewed within Outlook on the computer. To avoid reaching your quota of storage space on your mail service, Macintosh Outlook users can move messages to folders designated as On My Computer within Outlook. Managing Space with On My Computer Folders - Outlook for Mac Managing Space with On My Computer Folders - Outlook for Mac 2.13.