Even if your account uses an offline Outlook Data File (.ost) for all of its day-to-day information, you may still have an archive.pst file that contains older information.

Note: If your organization has policies in place that archive email messages automatically, your older email messages, calendar events, and tasks might be stored in an archive Outlook Data File (.pst).

If you want to open or close an Outlook Data File (.pst), you can do that in a few simple steps. But do you wonder how and where all those items are stored? For Microsoft 365, Exchange, and accounts, all of your information is stored on the server, but an offline copy is also stored on your local computer in an Offline Outlook Data File (.ost).įor POP and IMAP accounts, you might store your Outlook items in an Outlook Data File (.pst). You use it to send email messages, to set up calendar events, and to create tasks and other items. Outlook for Microsoft 365 Outlook 2021 Outlook 2019 Outlook 2016 Outlook 2013 Outlook 2010 Outlook 2007 More.

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