Feb 7, 2018 - Important: If you're using Outlook 2013, use the path C: Program Files. While Microsoft's tool can diagnose and repair many problems with a.pst file, the recovery. It's available to download for both PC and Mac computers.
The desktop Outlook app uses two types of data files to store local copies of your emails, calendars, contacts, and other items, to allow you access to your information without an internet connection. If you're using an Outlook.com,, or Exchange account, this information is stored in an Offline Outlook Data File using a.ost format.
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