Why Does Outlook Say OST File Cannot Be Opened?

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Written By Stephen Robert

Read this blog post to learn more about the Outlook OST file that cannot be opened and the reason behind this error. We have introduced a dual technique to open OST files in Outlook to fix this error by using DIY and third-party software using OST to PST Converter.

Outlook is an advanced email client that offers a wide range of services like messaging, and security features. However, occasionally problems can arise and trigger error messages, such as Outlook OST files cannot be opened. This error usually comes when there is a specific event, such as an Outlook update and reinstallation.

Why OST File Cannot Be Opened?

  • Due to storage failure.
  • When Outlook doesn’t shut down properly.
  • If the OST file is disconnected from the server.
  • OST files get corrupted.

How To Open an OST File In Outlook Via DIY Method?

If you have an active OST file and want to open another account or profile. Then you can opt for Outlook’s exporting features to complete the process.

  • Install Outlook and then click on the file function on the taskbar.
  • Then click on “Open” and “Export” and then on “Import/Export”.
  • Next, click on “Export to a file” in the list of export options and then click on the “Next” button.
  • From here, tap Outlook Data File and then tap Next to proceed to the next step.
  • Browse the mailbox folder that you want to open.
  • Finally, choose a location for the resulting file and then click “Finish” to end this process.

Drawbacks Of Using Manual Technique

  • It required a lot of free time and deep technical knowledge of Outlook.
  • Data can be exported, but some portions may be lost.
  • This manual technique fails to recover and convert orphaned, corrupted, and oversized OST files.
  • Data integrity is not preserved as it was before the export process.
  • An Outlook installation and an exchange profile are required to perform this manual technique.

How To Open OST File In Outlook Via Professional Technique?

As you can see, there are many challenges associated with the manual technique. If you want to get rid of all the challenges, you can go ahead with SysTools OST Converter. It is the perfect choice to convert single or multiple OST files without facing overkill challenges.

  • Install and open the wizard on your computer.
  • Browse the OST file and add it to the software interface.
  • From the various export types, hit on the PST option.
  • Finally, set the output location and then click “Export” to get the result immediately.

Other Prominent Features Of Using Professional Tool

  • The integrity of the mailbox data will be preserved as with the original. 
  • This software can recover and convert orphan, corrupt, and large OST files.
  • It is very easy to do for all types of users without having advanced technical knowledge.
  • You can also opt for a filter feature to transform specific data by date range, subject, sender, and recipient.
  • There is no need to install another wizard to complete the solution.

Also Read: QuickBooks 2023 Server Not Running Error: Learn To Fix it!

The Verge

In this technical post, we have explained the process of opening an OST file in Outlook. We have also discussed the basic introduction of the OST file and also mentioned the reason behind this error. In addition, we discussed dual techniques. If you have an active OST file and you have a deep technical knowledge of Outlook, then you can proceed with the manual technique since you know yourself better. Otherwise, we recommend you opt for professional software to complete the process.

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