Converting OST files into PST prevents data loss, especially if they become inaccessible due to corruption, server crashes, or other issues.
Converting to PST allows for easy backup of specific mailboxes, facilitates repair of corrupt OST files containing unsaved data, and enables access to emails during Exchange downtime or without an internet connection, regardless of why you want to convert your Outlook OST files into PST. You can follow the methods mentioned below.
How to Convert an OST File to a PST File?
Using the steps in the article below, you can easily convert OST to PST. Firstly, you can log in to Outlook with the same Exchange profile connected to the Exchange server and then try specialized tools like Remo OST to PST Converter Software or use Outlook’s Import/Export feature.
1. Convert OST to PST Using Remo Convert OST to PST Software:
Remo OST to PST Converter is one of the best Outlook file conversion tools for making this task simple and convenient for a user. The software completes the conversion procedure in just a few simple steps and is risk-free.
This tool not only converts OST files to PST files but also recovers, backs up, and retrieves all data items from offline OST files.
It also allows you to make conversions without file size restrictions and preview data like emails, contacts, calendars, and other mailbox items before converting them.
Easy Steps to Convert OST to PST File in MS Outlook
Step 1. Download, install, and launch the Remo OST to PST Converter tool on your computer.

Step 2. Choose either Open OST File (if you want to locate the OST file manually) or Find OST File (if you want the software to locate the OST file automatically) before clicking Next.

Step 3. On the next screen, choose the Browse option to provide the destination path for the converted PST file and then click on Convert.

Step 4. The Remo OST converter tool now converts the OST file to a healthy PST file.
Note: Even without an Exchange profile or server connection, the Remo OST to PST converter software can convert inaccessible, corrupted, or even convert orphaned OST files to PST format.
The next solution is a manual way of converting Outlook OST files to PST files.
2. Export Outlook data file as a PST file:
To manually convert OST files, your PC must be set up with Outlook and linked to a Microsoft Exchange server. The steps for the rest of the procedure are as follows:
- To begin, open MS Outlook, then select File and Import/Export from the drop-down menu.

- Select an action that appears in a new dialogue box. Then, proceed by selecting Export to a File.

- The following screen will ask you to select the file type you want to import. Select Outlook data file (.pst) and then click Next.

- Select the folder from which you want to export data and click Next.

- Select Allow duplicates to be created from the drop-down menu and click Finish.
- A second pop-up will appear, asking for an optional password. It is simple to proceed without entering it.
You’ve now manually converted Microsoft OST files into Outlook PST files. At the designated location, you can verify your OST files stored in converted PST format.
Limitations of Manual Method:
The manual approach for converting OST to PST Outlook has several downsides, which are listed below:
- You’ll need to configure an Outlook account with an exchange server.
- The process is slow compared to direct procedures, such as using a professional tool.
- While exporting OST, data loss or corruption of OST files is possible.
- File size restriction.
To overcome the limitations, we suggest using an automated tool to convert OST to PST in Outlook 2021, 2019, 2016, and other versions.
Conclusion:
Manual methods are quick and easy to use but have certain drawbacks. If your computer has MS Outlook configured with Exchange Server, you can convert OST to PST manually for free. These processes are frequently more time-consuming.
Using reliable software is a convenient and effective technique. This software is recommended since it is user-friendly and has extensive features. Use this trustworthy and effective software to manage your important data.
Frequently Asked Questions on Converting OST Files to PST:
Using the Remo OST to PST Converter Tool, you can easily convert an OST to PST in Office 365. You can also use it to transform files in Outlook 2021, 2019, 2016, 2013, 2010, 2007, and Office 365. Follow the three simple steps in the article to make the conversion quick and easy.
To convert the OST file into PST on Mac, follow the steps given:
1. Open a data file in Outlook (. pst or . olm)
2. Click Import from the File menu in Outlook for Mac.
3. Then, on the right arrow, click Outlook Data File.
4. Click the right arrow after selecting a data file type.
5. Select Import after you’ve found the data file on your computer.
6. Click Done when the import process is finished.
To manually convert an OST file to a PST file, follow these steps:
1. Navigate to the File menu in Outlook.
2. Choose Import/Export from the drop-down menu.
3. Select Export to a file from the drop-down menu.
4. Choose the Outlook Data File option (. pst)
5. Select whether to export a single folder or the entire account.
6. Include subfolders option should be checked.
You can convert OST to PST without using Outlook by using a third-party OST to PST converter software. Here are the steps for using a typical OST to PST converter:
1. Download and install the OST converter software on your computer.
2. Launch the software and select the OST file you want to convert.
3. Choose the option to convert the OST file to PST file.
4. You can now select the location where you want to save the converted PST file.
5. Start the conversion process and wait for it to complete.
6. Once the conversion process is complete, you can import the PST file into Outlook or any other email client that supports PST files.
It’s important to choose a reputed and reliable OST to PST converter software to ensure the accuracy and integrity of your data during the conversion process. Some popular paid options include Remo OST to PST Converter, Stellar Converter for OST, or Kernel for OST to PST.
1. Compatibility: Make sure the software is compatible with your current version of Outlook and your operating system.
2. Conversion Quality: Look for a tool that can accurately and reliably convert OST data, including email messages, attachments, contacts, calendars, and other elements.
3. Speed of Conversion: Consider a tool that can quickly convert large OST files, especially if you have a lot of data to transfer.
4. User-Friendliness: Choose a tool that is easy to use, even for those without technical expertise. A clear, intuitive interface and step-by-step instructions can make the conversion process smoother.
5. Price: Evaluate the cost of the software and make sure it is within your budget. Consider the cost-effectiveness of the software concerning its features and functionality.
6. Customer Support: Look for a software vendor that offers helpful and responsive customer support in case you need assistance with the conversion process.
7. Data Security: Make sure the software you choose respects your privacy and protects your data during conversion.
8. File Size Limitations: Some free converters have limitations on the size of OST files they can convert, so be sure to check this if you have a large OST file.
Considering these factors, you can pick the right OST to PST converter software that meets your specific needs and requirements.