Offline folders in Microsoft Outlook


Definition of Offline folders in Microsoft Outlook in the Network Encyclopedia.

What is Offline Folders in Microsoft Outlook?

Offline Folders is a feature that allows users to copy the contents of server-based folders to their hard disks or to a network share. Offline folders have a format similar to personal folders, but they have the extension .ost instead of .pst. To copy information to offline folders, you choose Synchronize from the Tools menu on the Outlook toolbar and select the synchronization method that you want to use.

Offline Folders in Microsoft Outlook
Offline Folders in Microsoft Outlook

Folders as a group

In Microsoft Outlook, the following folders are always considered as a group; if one of them is marked for offline use, all of them are:

  • Inbox
  • Outbox
  • Deleted Items
  • Sent Items
  • Contacts
  • Journal
  • Notes
  • Tasks

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