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    1. Home
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    3. How to import an OST file into Microsoft Outlook?

    Import OST file into Outlook

    Steps to import OST into Outlook 2019, 2016, 2013

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    • OST to PST
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  • How it works?
    • OST to PST Converter
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  • Connect to Exchange server for multiple mailboxes migration
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    • Corrupt OST file recovery
    • Unicode and ANSI OST format
    • Split OST file
    • Rebuild OST file
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    • Recover orphaned OST file
    • Recover all Exchange and Outlook OST files
    • Recover metadata and attachments
    • Export unlimited OST files to PST
    • Free OST file viewer
    • Granular recovery of OST file
    • Recover encrypted OST file
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    • Selective OST export
    • Migrate OST to Office 365
    • OST to Live Exchange
    • Outlook OST cannot be accessed
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    • Fix Outlook not connecting to server error
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    • Fix Outlook not syncing error
    • Outlook Cached Exchange mode
    • Fix Outlook data file cannot be accessed
    • Fix the error Outlook inbox not updating
    • Your mailbox has been temporarily moved on Exchange server
    • Open OST file in Outlook
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    • Import OST file into Outlook
    • Your Outlook data file cannot be configured
    • Errors have been detected in the OST
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What is an OST or Offline Storage Table file?

OST (Offline Storage Table) is a file format used by Microsoft Outlook to store mailbox data when you're working in an offline mode. In case of a system crash, corruption, or an accidental deletion, the OST file can be a lifesaver. But what if you need to import the OST file into a different system or use it with a different email client? In this article, we will explain how to import OST files into Microsoft Outlook step by step, so that you can easily access your mailbox data.

Common reasons to import OST file into Outlook

There can be several reasons why you may need to import mail items from an OST file into Microsoft Outlook. Here are some of the common ones:

  1. Migration to a New Computer: When you switch to a new computer or reinstall your operating system, you may need to import the OST file into Microsoft Outlook to access your mailbox data.
  2. Exchange Server Crash: In case of an Exchange server crash, you may need to load the OST file into Microsoft Outlook to access your mailbox data.
  3. Recovery of Deleted Items: If you accidentally delete an email or other mailbox items from your Microsoft Outlook profile, you may be able to recover them by importing an old OST file.
  4. Corruption of Mailbox: Sometimes, your mailbox data in Microsoft Outlook may become corrupt due to various reasons such as hardware failure, software issues, or virus attack. In such cases, importing the OST file can be a useful option to recover your mailbox data.
  5. Switching to a Different Email Client: If you want to switch to a different email client other than Microsoft Outlook, you can convert the OST file to PST format and then import it into the new email client.

QUICK LINKS

Fix Outlook data file cannot be accessedUnicode and ANSI OST formatYour mailbox has been temporarily moved on Exchange serverSplit OST fileOST to Office 365 importerOutlook Cached Exchange mode

Importing OST file into Outlook

How to find the OST file location on your computer?

Before you can import an OST file into Microsoft Outlook, you need to locate the file on your computer. In this section, we guide you on how to find the OST file location on your computer.

  • Step 1: Launch the Control Panel and open the Mail Applet
    • Click ‘Start’ on Windows desktop and type ‘Control Panel’ in the search bar.
    • In the Control Panel, select the ‘Mail’ applet and click ‘Data Files’
  • Step 2: Locate the OST File on your computer
    • In the Data Files dialog box, you will see a list of all the data files associated with your Microsoft Outlook profile.
    • Look for the OST file associated with your email account and click ‘Open File Location’
    • You can find the OST file in the folder that opens.

      Open file location

      Alternatively, you can navigate to the OST file location by following the path

      C:\Users%username%\AppData\Local\Microsoft\Outlook

      where ‘%username%’ is the name of the user account on your computer.

Why can't you directly import an OST file into Outlook?

An OST file enables you to work offline and access your mailbox data even when you are not connected to the Exchange server. However, you cannot directly open an OST file in Microsoft Outlook. Here are the reasons why:

  1. Synchronization with Exchange Server: The purpose of an OST file is to enable you to work offline and synchronize your mailbox data with the Exchange server when you connect to it. Therefore, the data in an OST file is not meant to be directly accessed, because it needs to be synchronized with the Exchange server to ensure that all your emails and mailbox items are up to date.
  2. Security and Protection: OST files are encrypted and protected by your Microsoft Exchange profile with a MAPIEntryID GUID key. Directly importing an OST file into Outlook can compromise the security and integrity of your mailbox data.
  3. File compatibility issue: OST files are not compatible with Microsoft Outlook, which means that you cannot directly open them in the email client. If you try to open them in Outlook, you may notice the following error message ‘The program you have selected cannot be associated with this file type. Please choose another program’. OST files are meant to be used by the Exchange server and are stored in a different file format than PST files.

Therefore, to access the data in an OST file, you can make use of the methods described in the following section.

How to import OST files into Outlook?

To import OST files into Outlook, first convert the OST to PST format, then import the PST into Outlook. You can convert the OST file to PST using the Outlook Import/Export wizard or a third-party OST to PST converter tool like EdbMails.

Method 1: Convert OST to PST from Outlook

Here are the steps to convert an OST file to PST format in Microsoft Outlook with the Import/Export Wizard:

  • Step 1: Open the Import/Export wizard in Outlook
    • Open Microsoft Outlook and click on the ‘File’ tab in the top left corner of the screen.
    • Click on the ‘Open & Export’ option and select ‘Import/Export’ from the dropdown menu.

      Open the Import/Export wizard

  • Step 2: Select export type as Outlook PST
    • In the Import/Export wizard, select ‘Export to a file’ and click ‘Next’.
    • Choose ‘Outlook Data File (.pst)’ as the file type to export and click ‘Next’
    • Select the folder or account that you want to export from and click on the ‘Next’ button.
    • Choose a location to save the new PST file and give it a name.

      Select export type as Outlook PST

  • Step 3: Select the mailbox items to export
    • Choose the option ‘Include subfolders’ to export all items in the folder or account.
    • If you only want to export specific items, select ‘Filter’ and choose the desired criteria.
    • Click ‘Next’ to proceed.

      Select the mailbox items

  • Step 4: Export the OST file contents to PST
    • If you want to password protect the exported PST file, enter a password and click ‘OK’
    • Click ‘Finish’ to start the export process.
    • Wait for the process to complete and click ‘OK’ when the export is finished.
  • Step 5: Import the PST file into Outlook
    • Open Microsoft Outlook and click on the ‘File’ tab in the top left corner of the screen.
    • Click on the ‘Open & Export’ option and select ‘Import/Export’ from the dropdown menu.
    • Choose ‘Import from another program or file’ and click ‘Next’
    • Select ‘Outlook Data File (.pst)’ as the file type to import and click ‘Next’.
    • Browse to the location where you saved the new PST file and select it.
    • Choose the option ‘Replace duplicates with items imported’ to avoid importing duplicate items.
    • Select the folder or account where you want to import the data and click ‘Finish’

    By following these steps, you can convert an OST file to PST format and import the PST file into the email client for easy access to your mailbox data.

    While using the Import/Export wizard to convert OST to PST is a relatively straightforward method, there are a few limitations to keep in mind:

    1. Data loss: The Import/Export wizard may not be able to export all data from an OST file, resulting in data loss during the conversion process.
    2. Size limitations: The size of the OST file can affect the conversion process. If the OST file is too large, the Import/Export wizard may not be able to complete the conversion, or it may take a very long time.
    3. Corrupted OST file: If the OST file is corrupted or damaged, the Import/Export wizard may not be able to convert the file to PST format successfully.
    4. Importing OST into Office 365: The Import/Export wizard does not offer any facility to directly import emails and mailbox items from OST to Office 365.
    5. Password-protected OST files: If the OST file is password-protected, you will need to enter the password during the conversion process. If you do not have the password, you will not be able to convert the file using the Import/Export wizard.

Method 2: Archive emails from OST to PST

The second method to open mailbox contents from Outlook is to archive the OST file to PST by using the Auto Archive Settings in Outlook. This feature can help free up space in your mailbox while also ensuring that important emails are stored safely in an archived file.

Here are the steps to archive emails from OST to PST using the Auto Archive settings in Microsoft Outlook:

  • Step 1: Open Auto Archive Settings in Outlook
    • Open Microsoft Outlook and click on the ‘File’ tab in the top left corner of the screen.
    • Click ‘Options’> ‘Advanced’ > ‘AutoArchive Settings’

      Open Auto Archive Settings

  • Step 2: Set up Auto Archive options
    • Check the ‘Run AutoArchive every’ box and set a time frame for how often you want to run the Auto Archive process.
    • Choose the folder or folders you want to archive. You can choose to archive all folders.
    • Choose the Default folder settings for archiving and set a time frame for how old the items should be before they are archived.
    • Choose the location where you want to save the archived PST file
    • Click ‘OK’ to save the Auto Archive settings.
  • Step 3: Customize the Auto Archive settings for folders
    • To specify different archive settings for any folder, right-click on the folder in Outlook > choose ‘Properties’ and then go to the ‘AutoArchive’ tab
  • Step 4: Run the Auto Archive process
    • Wait for the specified time frame for the Auto Archive process to run automatically.
    • Alternatively, you can click ‘File’> ‘Tools’ > ‘Clean Up Old Items’ to archive items manually.
    • Check the location where you saved the archived PST file to confirm that the items have been successfully archived.

    Note: If the OST file is corrupted or orphaned, you will not be able to export or archive emails to PST format from Outlook. In this case, you must use EdbMails converter tool to open and convert the OST to PST files.

Method 3: Import OST into Outlook 2019, 2016, 2013 and 2010

EdbMails is a reliable and powerful tool for converting OST to PST and importing the PST into Outlook. It has many advantages over the other manual methods and is a good option if you can't open the OST file or want to directly import the OST file into Office 365 and Live Exchange server. It is Outlook-compatible and enables you to repair and open corrupted and orphaned OST files without the need for Outlook.

Here are the steps to convert OST to PST with EdbMails and import the PST into Outlook:

  • Step 1: Download and install EdbMails OST converter tool
    • Go to the EdbMails website and download the software.
    • Install the software on your computer by following the installation wizard.
    • Click ‘Start Your Free Trial’ and choose the OST recovery, conversion and migration option.

      Choose OST Recovery

  • Step 2: Select the OST file and set the export options
    • Click ‘Browse’ and select the OST file that you want to convert.
    • Click ‘Continue’ to proceed.
    • EdbMails displays the entire OST file contents including emails, folders, contacts, calendars, notes, tasks, appointments. You can preview specific items before the export.
    • Choose the export options such as excluding certain folders or setting a date range for the export.
    • Choose a location where you want to save the exported PST file.

      browse ost

  • Step 3: Convert the OST file to PST
    • For the conversion, ensure that you have Outlook installed in your computer. Click on the ‘Export OST to PST’ button to start the conversion.
    • Wait for the process to complete. The time it takes depends on the size of the OST file and the options you selected.

      Select the mailboxes to Export

  • Step 4: Import the PST file into Microsoft Outlook
    • Launch Microsoft Outlook and click on the ‘File’ tab in the top left corner of the screen.
    • Click on ‘Open & Export’ and select ‘Import/Export’ from the dropdown menu.
    • Choose ‘Import from another program or file’ and follow the steps to import the PST file.
    • Click on ‘Finish’ to complete the import process.

    Here are a few advantages of EdbMails over the other methods:

    1. Easy to use: EdbMails has a user-friendly interface that makes it easy for even non-technical users to perform OST to PST conversion. Additionally, you can convert mail items from OST to HTML, EML, and MHT formats.
    2. Speed: EdbMails is designed to convert large OST files to PST quickly and efficiently, so you don't have to wait for hours for the conversion process to complete.
    3. Data integrity: EdbMails ensures that your data is converted with 100% accuracy and integrity, so you don't have to worry about losing any important data during the conversion process.
    4. Flexibility: With EdbMails, you have the flexibility to choose which data you want to export from the OST file, such as specific folders, date ranges, or exclude folders that you don't need.
    5. Advanced features: EdbMails offers advanced features like support for encrypted OST files, the ability to preview the OST file data before conversion, and the option to save the converted PST file to a network location.

Summary

In this article, we discussed the different methods for importing OST files into Microsoft Outlook. You can use the Import/Export Wizard or archive email from OST to PST and then import the PST file into Outlook. However, if you no longer have access to the Exchange server or if the OST file is corrupted or damaged, you will need a professional OST to PST converter to export and open your mail data in Outlook. EdbMails can repair OST files and convert all of your mail data from OST to PST while maintaining complete data consistency and integrity.

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