Microsoft Outlook saves mailbox data in Offline Storage Table (OST) file when configured with IMAP, Exchange, or Outlook.com account. This OST file is encrypted and bound to the Outlook profile that creates it. So, you can’t access the OST file from any other Outlook profile.
Sometimes, this Outlook data file may get damaged or corrupted due to issues with the storage drive, system, malware/virus infection, etc. Though you can repair or recreate the OST file to solve such issues, but this doesn’t work if the OST file becomes inaccessible or orphaned. In such situations, you need to use an OST to PST converter tool such as Stellar Converter for OST to convert OST to Outlook importable PST file and then access the contents.
About Stellar Converter for OST
Stellar Converter for OST is an advanced software that converts inaccessible OST into PST and other popular file formats such as HTML, PDF, MSG, etc. You can also use this software to transfer the ost file to another drive or an existing Office 365 account, split and compact the converted PST files, and more.
Stellar Converter for OST Highlights
- This OST to PST converter software can convert large OST files into PSTs in just a few simple steps.
- The software converts all OST mailbox items into PST, including emails, attachments, calendars, and contacts.
- The converted PST file retains the folders’ structure of the original OST file.
- The software can convert encrypted and orphaned OST files to PST.
- The software allows you to save OST’s scan progress in a DAT file. You can use this file to complete the conversion in multiple steps. This is helpful if you have a large OST file which will take a long time to convert.
- You can convert multiple OST files in a single session through batch conversion.
- You can use the OST to PST converter software to split & compact a large PST file by size, email ID, folder, and date.
System Requirements
- Processor: Intel-compatible (x86, x64)
- Operating System: Windows 10, 8.1, 8, 7
- Memory: 4 GB minimum (8 GB recommended)
- Hard Disk: 250 MB of free space
Hands-On Experience
Stellar Converter for OST is a well-designed, powerful, and efficient OST to PST converter. Even if you aren’t technically strong, you can use the software without any problems. It has a user-friendly interface and offers an intuitive OST to PST conversion process.
To convert an OST file to PST by using the software, follow these steps:
1. Launch the software and click Browse to provide the location of the OST file on your system. If you don’t know the location, click Find.
2. Click Convert to begin the conversion process.
3. Preview mailbox items in the preview pane once the conversion process is over. Then select the folders and items you want to save to PST.
4. Click the Save Converted File button under the Home tab.
5. In the Save As window that opens, select PST file format (there are other options too such as MSG, HTML, PDF, etc.). Then click Browse to enter the location for saving the PST file. 
6. Click OK to finish the OST to PST conversion process.
Stellar Converter for OST Editions
The OST to PST converter software from Stellar comes in three variants – corporate, technician, and toolkit, depending on the features. The differences between these editions are covered in the table below.
| Features | Corporate | Technician | Toolkit |
| OST to PST conversion | Yes | Yes | Yes |
| Conversion of all mailbox items | Yes | Yes | Yes |
| OST items preview | Yes | Yes | Yes |
| Saving and loading scan information | Yes | Yes | Yes |
| Support for all Outlook versions | Yes | Yes | Yes |
| Multiple saving options such as HTML, PDF, etc. | Yes | Yes | Yes |
| Converts encrypted OST files | Yes | Yes | Yes |
| Batch file conversion | No | Yes | Yes |
| Option to compact and split PST files | No | Yes | Yes |
| Option to export Outlook contacts | No | Yes | Yes |
| Direct exporting to Office 365 account | No | Yes | Yes |
| Recovers all mailbox items | No | No | Yes |
| Merges multiple PST files | No | No | Yes |
| Removes duplicate emails | No | No | Yes |
| Recovers lost PST password | No | No | Yes |
| Recovers deleted emails | No | No | Yes |
Verdict
To summarize, we can say that there is little to complain about Stellar Converter for OST. This OST to PST converter utility is highly efficient, easy-to-use, and has all the features you need in an OST converter. One thing that some users may not be pleased with the product is that advanced features such as splitting PST files, export to Office 365 account, etc. are not available in the base variant, i.e. the corporate edition.
However, we will recommend Stellar Converter for OST if you’re looking for a decent OST to PST converter software.
