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“I’ve been getting the ‘Outlook is using an old OST file copy’ error for a while now. And I have to say that it was really starting to get on my nerves. Every time I tried to send an email, make a calendar appointment or do anything else with Outlook, I would get that cryptic error message.

But I finally found a solution! After trying a few different methods – including uninstalling and reinstalling Outlook, changing the file path, and checking for updates – I finally found a fix that worked.”

So, if you’re having the same problem, read on.
In this post, we will discuss the best solutions for resolving the “Outlook is using an old copy of your Outlook Data File” error. We will also provide step-by-step instructions on how to implement these solutions. Let’s get started.

Why does the old OST file copy error in Outlook?

OST file copy error in Outlook

This error message can happen for a variety of reasons, including:

Reason #1: The Data File is Corrupt or Damaged

One of the possible reasons for the “Outlook is using an old copy of the Outlook data file” error is a corrupt or damaged Outlook data file. When this happens, Outlook will no longer allow you to read the data file properly, which can cause all sorts of problems.

Reason #2: The Data File is Too Large

Another reason for this error to occur is the large size of the data file. When Outlook data files are oversized, they can experience performance issues.

Reason #3: You’re Using an Outdated Version of Microsoft Outlook

If you’re using an outdated version of Microsoft Outlook, it’s possible that you may start seeing the “Outlook is having an old copy of the Outlook data file” error message. This is because older versions of Outlook are not compatible with newer versions of Windows.

Reason #4: There are Multiple Copies of your Outlook Data File

Another reason for this error is that there are multiple copies of your Outlook data file on your computer. This can happen if you’ve installed multiple versions of Microsoft Outlook on your computer or if you’ve migrated your emails from one computer to another without deleting the old copy of the data file.

How to Resolve the Old OST Copy Error in Outlook?
  1. Locate the OST file & Delete It
    The first step is to locate the OST file. This file is generally located in the following location: C:\Users\[Your User Name]\AppData\Local\Microsoft\Outlook\. Once you’ve found the file, delete it.Locate the OST file and delete it
  2. Exit Outlook & Restart your Computer
    After you’ve deleted the OST file, exit Microsoft Outlook, and restart your computer. Once your computer has rebooted, open Outlook and check to see if the error message has been resolved.
  3. Recreate your OST File
    If deleting the OST file and restarting your computer doesn’t work, you’ll need to recreate your OST file. Once the older OST file is deleted from its default location, Outlook will automatically recreate the OST file. Else you need to open Microsoft Outlook and go to File > Account Settings > Data Files > Add. Select the new folder that you created for your OST file and click “OK.”Recreate your OST File
  4. Set the New OST File as Default
    Once you’ve recreated your OST file, you’ll need to set it as the default data file. To do this, go to the tab File > Account Settings > Data Files > Settings > Always use this profile > choose the new Outlook profile name with .ost extension > click “Set as Default” and then “Close.”Set the New OST File as Default
  5. Exit & Restart Outlook
    Exit Microsoft Outlook and then restart the program. Your “Outlook is having an old copy of your OST file” error should now be fixed.
  6. Note: If deleting and recreating your OST file doesn’t fix the issue, then the following step is to check for corruption of OST files. To do this, go to Start > Search and type in “%temp%.” This will open up your temp folder. Inside the temp folder, look for any files that start with “tmp” or “~.” If you find any, delete them.

  7. Run Scanpst to Repair Your Damaged or Corrupt Data File
    If your data file is damaged or corrupt, one way to fix it is by running a tool called Scanpst. This tool is designed to repair errors in your data file so that Outlook can access it again without any issues.
    There are a few essential things you should do before running the scanpst.exe tool:

    • First, make sure that Outlook is closed. You won’t have access to your PST file if Outlook is open.
    • Next, locate the scanpst.exe file on your computer. The location is C:\Program Files (x86)\Microsoft Office\root\Office. However, it’s possible that the file has been moved to another location on your computer. If you can’t find it, do a search for “scanpst.exe.”
    • As the program comes up, click on it and then browse for your data file.
    • Once you’ve selected your data file, click on Start to begin scanning it for errors.
    • If any errors are found, they can be fixed. After the scan is complete, restart Outlook and see if the error is still occurring.
  8. Update Microsoft Outlook to its Latest Version
    When users see this error message, it may indicate that the software has to be updated to the latest version. This can be done by opening Outlook, going to Help > Check for Updates, and then following the prompts.

    Microsoft releases updates for Outlook on a regular basis. These updates usually contain bug fixes and new features. It is important to keep Outlook up to date so that users can take advantage of these new features and fixes. In addition, keeping Outlook up to date will help ensure compatibility with other software products that interact with Outlook, such as Exchange Server.

Safe Outlook Recovery

Recently, a lot of people have been facing the issue of “Old Copy of the OST File in Outlook.” As we now know, this issue can be fixed, but it comes with a risk of major data loss. That is why it is usually a good idea to recover Outlook data. And what is better than converting your OST file into PST?

But the question is, how do we convert our OST files into PST format? Well, Kernel for OST to PST Converter can help. It is a reliable tool that can convert OST to PST quickly. The converter supports all versions of MS Outlook and Windows OS. Also, it has the option to save converted OST files in multiple formats like EML, MSG, DOC, DBX, MBOX, TXT, RTF, HTML, MHTML & PDF

There are many reasons why this utility is a great choice for recovering your Outlook data file. The software is easy to use, supports a variety of formats, and doesn’t result in any data loss. Plus, it’s very affordable compared to other options on the market. So, if you’re searching for an easy way to keep your Outlook data safe, this tool becomes the perfect choice.

Final Say

Fortunately, there are many ways which can troubleshoot the “Outlook is using an old copy of your Outlook Data File” error. By following the solutions in this article, you must be able to resolve the issue and get your Outlook up and running again without any problems. If you still have any questions or if you need help troubleshooting your Outlook, feel free to contact our support team for assistance.

Kernel for OST to PST Converter
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