How Outlook Stores Data
If you are a home Outlook user, your default data file is a Personal Folders File (PST file). If you are using Outlook in a business setting, your default data file may be an Exchange mailbox located on a Microsoft's Exchange server computer. All Outlook data is stored in one of these types of data files; there are no separate files for e-mails, calendars, address books, or other Outlook data.
| PST Files | Exchange Mailbox |
|---|---|
| Stored on your hard drive. | Stored on an Exchange server (typically only found in a corporate setting). |
| Can be opened by only one person at a time, and cannot be shared simultaneously with different people. | Can be shared and opened by more than one person at a time, if the other people have permission to open ... |
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