How to Safely Open OST Files in Outlook?

Safely opening OST files in Outlook can be tricky as they are not meant to be directly opened unlike Outlook supported PST files. If you want to safely open OST files in Outlook then you need to convert OST files to PST format. Here are complete guide to resolve this query.

Brief Introduction About OST File and PST File

OST file stands for Offline Storage Table, which is an offline Outlook data file used by Microsoft Exchange Server. OST files allow users to access their mailbox data even when they are not connected to the Exchange Server.

PST file stands for Personal Storage Table, which is a personal folder file used by Microsoft Outlook to store email messages, contacts, calendar items, and other Outlook data. PST files are stored on the user’s computer or on a server.

How to Safely Open OST Files in Outlook?

There are many methods to open OST files in Outlook but here we will discuss 2 prominent way to to complete this task.

Method1: Import/Export Feature of Outlook

  1. First, open Microsoft Outlook on your computer.
  2. Go to the “File” menu at the top left corner of the Outlook window.
  3. Click on “Open & Export” from the menu options.
  4. Select “Import/Export” from the drop-down list.
  5. Now, In the Import and Export Wizard dialog box, choose “Import from another program or file” and click “Next”.
  6. Choose “Outlook Data File (.pst)” and click “Next”.
  7. Click on the “Browse” button to locate the OST file you want to open in Outlook.
  8. Select the OST file and click on “Open” to import it into Outlook.
  9. Choose the option to import the file into the default folder or select a specific folder to import the data.
  10. Click “Finish” to complete the import process.
  11. The OST file will now be opened in Outlook and you can access its data within the application.

Note: It is important to remember that the Import/Export Wizard in Outlook may not work for all OST files, especially those that are password-protected or corrupt. In such cases, you may need to use third-party OST to PST converter tool to access the data in the OST file.

Method2: Using a Reliable OST to PST Converter Tool

With powerful ZOOK OST to PST Converter, you can quickly and efficiently convert their OST files to PST format without losing any data or information, so that users can easily open OST files in Outlook and access their emails, contacts, notes, journals and all other data. This tool is user-friendly and has a simple interface, which makes it easy for even novice users to convert OST files to PST format. Below are written few simple steps to use this tool:

  1. Install and Run OST to PST Converter in Windows Computer.
  2. Click on the Select Files or Select Folder to Add OST File to Software Panel.
  3. Now, Click on the Browse Option and Set Saving Location For Converted PST File.
  4. At the end, Click on the Convert Button to Begin Conversion Process.

Note– One the conversion process completes then you can access converted PST data in all versions of Outlook including 2019, 2016, 2013 and all below versions.


Above I have mentioned both manual and professional methods but here I want to note down that using a reliable OST to PST Converter is more beneficial for users, as it is risk-free and instant solution to convert highly corrupted, damaged or inaccessible OST data files to PST format to open OST files in Outlook 2019, 2016, 2013 and all below version. I hope, Outlook users would be very beneficial from this article.

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