How to Restore OST file in Outlook 2019, 2016, 2013, 2010, 2007?
An OST file holds your Exchange or IMAP mailbox cache locally. When the original account is gone, broken, or the profile is wiped, that OST becomes unreadable in Outlook. The fix is a one-time conversion to PST, which any Outlook version can mount. This guide walks through the conversion and the import step in detail.
4n6 OST restorer tool to restore OST file in Outlook
Complete your task in a few moments with 4n6 Email Converter. This is the only way to restore OST file in Outlook 2019, 2016, and the lower version. With the help of this app, you can convert the OST files and open the OST files so easily. Even if there are so many advantages to this tool, we want to help you get an overview about it in a few lines.
- The application provides a simple interface for user convenience.
- Allow to export multiple OST files to PST with just a few clicks.
- Converted PST files are compatible with all versions of Outlook 2019, 2016, and earlier
- Allows users to choose the destination path to save the resulting PST files.
- Completely independent and does not require any other application configuration.
- Preserves the integrity of the data while converting OST files to PST files
- Compatible with all versions of the Windows operating system
- 100% safe from all types of malware.
Apart from these, one of the main qualities of the tool is that it saves time as it can export your OST files to PST in a few steps. So, let’s look at the process so you can be able to restore OST file in Outlook 2019 and lower versions.
The process to export OST files to PST format
Tip: The tool is supplied with a demo edition. Using this trial version benefit, you can know the working process and quality of the tool. You will be able to check the software working process. Besides exporting, you can freely view as many OST files as you want.
- Download and install the OST restorer software on your pc.
- Start the application and click on Open button.

- Choose Email Data Files from the various options, now select the Outlook PST / OST Files

- Choose files from the location where your files have been preserved.
- Once you click open on the pop-up Window, your data will start uploading in the software panel

- Now click on the Export tab and choose PST as saving format

- Click on the Browse button to choose a destination folder

- Lastly, press the Save button to start conversion
Well done, you followed the steps correctly. Now your OST files will be exported to Outlook PST in your selected location. Now you can easily import these files into Outlook using the manual function. Your question about how to restore OST file in Outlook 2019, 2016, and the below version is now solved.
In Conclusion
Since you cannot directly restore OST files in Outlook 2019, 2016, 2013, you cannot restore them until after converting these files to PST. In this situation, you need to use an alternative solution to make this task happen. For a quick and trustworthy solution, use the suggested application.
Common Errors When Restoring OST Files
This appears when you try to mount the raw OST directly. Convert it to PST first, then use Open Outlook Data File.
2. “Cannot open default email folders”
The OST was likely orphaned from its source profile. Run the converter, which reads the OST without needing the original Exchange account.
3. Corrupted OST after a crash
Run scanpst.exe first if the OST is mildly damaged. For heavy corruption, the converter rebuilds the message tree and recovers readable items.
4. Some emails missing in the converted PST
Make sure you select every folder in the converter, including hidden system folders like “Recoverable Items”.
Frequently Asked Questions
Outlook only opens OST files that belong to an active Exchange or IMAP profile. Standalone or orphaned OST files need conversion to PST.
Q2. Does the conversion preserve folder structure?
Yes. The output PST mirrors the OST folder tree exactly, including subfolders, calendars, contacts, and tasks.
Q3. Which Outlook versions can open the converted PST?
Every Outlook version from 2007 through Microsoft 365 reads the resulting PST without any compatibility flags.
Q4. Can the converter handle encrypted OST files?
Yes. The 4n6 tool reads MAPI encrypted OST files and writes a clean PST.
Q5. Is the original OST modified during conversion?
No. The OST is opened in read only mode. Your source file stays unchanged.
