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Top Use Cases

Top Scenarios for Using OST to PST Converter

Convert an inaccessible OST File to PST

When connected to the Exchange server, Import and Export wizard and Auto-Archive are the default methods that enable you to export OST data to a PST file. However, if your profile gets disconnected from the Exchange Server, the offline OST file becomes inaccessible, and the email account linked to it is unavailable. In such cases, manual methods won’t work, and you’ll need a reliable third-party tool. Stellar Converter for OST is the best solution to convert inaccessible OST files to PST. It converts emails, attachments, contacts, calendars, tasks, and notes efficiently.

Migrate OST File to Office 365/M365

If you are using hosted Microsoft Exchange server issues or security breaches can result in where you are no longer able to access emails. Outlook stores a local copy of your mailbox as OST files, but does not allow direct export of OST files to Office 365. Therefore, there may be a distortion of the folder hierarchy when you try to export OST to Office 365. This is because these two email clients manage the folder structure differently. Stellar Converter for OST bridges this gap by maintaining uniformity of folder structure during migration, thus ensuring complete data integrity.

When Outlook OST file Synchronization Fails

When MS Outlook is unable to synchronize emails, calendars, or contacts with the Exchange Server, it disrupt your email workflow. These errors often prevent sending or receiving emails and updating mailbox items. Major causes of this problem are outdated Outlook, network issues, and corrupt OST file. One method is to reconfigure the Outlook profile. Incase if the OST file becomes orphaned, Stellar Converter for OST can help. The software extracts emails from OST file and save them in PST file, making it easy to restore emails without any complication.

Reviews & Feedback

Recommendation by Microsoft MVPs

"A brilliant piece of software provided by Stellar Phoenix 'Convert your offline OST to PST file with Stellar OST to PST Converter Tool to get back your Emails' can help you achieve this."

mvp
Edward van Biljon
star
(MVP, Microsoft Community Contributor)

"Stellar Converter for OST helps admins extract all mailbox data such as emails, attachments, contacts, calendars, tasks, notes and journals from OST files, even if inaccessible for Outlook, and ingest that data into a live Exchange server"

mvp
Nuno Mota
star
Senior Exchange and Office 365 Consultant

"I have been using Stellar OST to PST converter since 2010 as an MSP provider using the Tech License and it has worked wonders for Outlook 2003 to 2016 conversions of OST Files."

mvp
Daniel Beato
star
System Administrator

Software Features and Functionalities

Capabilities of OST to PST Converter

Convert Large OST Files

Stellar Converter for OST converts large OST file to PST file, ensuring that all emails and items are converted with 100% integrity. The software also helps in splitting PST files if it exceed 50GB limit, thus preventing corruption. This way, users can convert large mailboxes without any data loss thus maintaining data integrity.

Steps to convert large OST file to PST file.

Step 1. Download and install the software on your Windows PC.

Step 2. Next, select or browse the OST file that you want to convert.

Step 3. Click on the "Convert" button to start the OST to PST conversion process.

Step 4. After the conversion, preview the converted emails.

Step 5. Click on the "Save converted file" option. Select "Outlook PST" as the desired file and click "OK".

Step 6. Check the location and click "OK" to complete the conversion process.

Free Download100% Secure
Converts Large-Sized and Encrypted OST Files to PST
Converts Large-Sized and Encrypted OST Files to PST

Seamless OST to PST Conversion with 100% Accuracy

The software effectively and accurately converts OST to PST file. Since OST manage folder structures differently, there is a high risk of data discrepancy during the conversion process. However, Stellar OST to PST converter tool ensures that the folder structure in the OST file is completely intact in the PST file after conversion.

Main Features:

  1. Accurate Conversion: Preview exactly what will be converted. Emails, folders and attachments are preserved with 100% data integrity.
  2. Folder Hierarchy Preservation: Mailbox structure, email properties and attachments, including timestamp and sender/recipient details, are preserved.

Learn More arrow

Convert Multiple OST Files in One Go

Stellar Converter for OST Technician, can convert multiple OST files to PST at one go. This batch processing feature saves maximum & effort.

Batch Conversion Process:

  1. Convert OST: Converts any number of OST files to PST to save time and cost.
  2. Split and Convert PST File:You can split the multiple PST file once the OST mailbox data is converted by date or size. For example, a 40 GB OST file can be converted into 4 separate 10 GB PST files.

Learn More arrow

Free Preview of Offline Outlook Data File

Know your Product Better

Other Features of OST to PST Tool

Auto-Locates and Lists Offline Outlook Data Files

Auto-Locates and Lists Offline Outlook Data Files

The Stellar Converter for OST simplifies the process of OST file conversion by automatically identifying OST files associated with respective Outlook profiles. Users can choose the “List Profiles” option to automatically detect and list configured profiles in Outlook from sources such as IMAP, Exchange server, and Microsoft 365 profiles. By identifying OST files automatically, there is no need for a manual search. Once selected, the user can save it in the desired location in the preferred format.

Extracts All Offline Outlook Data File (.ost) Items

Extracts All Offline Outlook Data File (.ost) Items

Stellar Converter for OST software is designed to convert all OST file items, including emails, folders, subfolders, attachments, appointments, contacts, calendars, tasks, notes, and journals. It preserves the original mailbox hierarchy and integrity and ensures that the converted PST file structure and formatting are the same as those of the original OST file.

Convert OST to PST or multiple formats

Convert OST to PST or multiple formats

The software allows users to convert OST mailbox into various formats, including PST, MSG, EML, RTF, HTML and PDF. This help users to access the email content of OST file in various utilities such as Microsoft Outlook, web browsers and PDF viewer.

Save and Load the Scanned File

Save and Load the Scanned File

The OST converter tool enables users to save the "scan" information of an OST file as a DAT file. This feature splits the conversion process into two stages: scanning the OST file and converting it to PST. Users can use this DAT file later for conversion, making it possible to complete the process at different times or on different systems without losing their progress.

Stellar

Stellar Converter for OST Technician

The Technician edition of Stellar Converter for OST comes with all features of Corporate Edition and with added features of batch conversion, splitting, compacting and direct migration to Microsoft 365. Learn More arrow

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AWARDS & REVIEWS

Most tested. Most awarded. For over 30 years, we’ve been recognized as experts

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ExpertExchange star
ExpertExchange

Stellar Converter for OST saves your business & time

With its great features, Good Interface, and ease of using Stellar OST to PST deserves 10 out of 10.

MakeUseOf star
MakeUseOf

Convert OST files to PST easily

Stellar Converter for OST makes OST to PST conversion process hassle-free

SpiceWorks star
SpiceWorks

Awesome OST TO PST Software

Stellar OST to PST converter has worked wonders for Outlook 2003 to 2016 conversions of OST Files. This application I use and resort to.

msexchange.org star
msexchange.org

Helps admin to easily convert any OST file to PST

It converts an entire OST file, or items within an OST file, into a PST without changing the original content format or structuring.

TweakTown star
TweakTown

Powerful OST to PST Converter Tool

Stellar Converter for OST converted all items from OST file to PST with complete integrity & precision.

Data Sheet

Technical Specifications

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About Product
Stellar Converter for OST
Version: 13.0.0.0
License: Single System
Edition: Corporate, Technician, & Toolkit
Language Supported: English, Deutsch, Français, Italiano, Español, 日本語
Release Date: February, 2025
System Requirement
Processor: Intel compatible (x64-based processor)
Memory: 4 GB minimum (8 GB recommended)
Hard Disk: 250 MB for installation files
Operating System: Windows 11, 10, 8.1, 8 (64 Bit only)
Version Support: MS Outlook: Office 365, 2021, 2019, 2016, 2013, 2010, 2007 (64 Bit only)
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How to convert an OST file to PST or other file formats?

Run Stellar Converter for OST and select the Outlook OST file. Then, scan the OST and preview the mail items stored in the OST file. Next, click the Save Converted File button and choose the file format to extract and save the converted data from the OST file.

How to save an individual email message in different file formats?

In the Preview screen displayed after scanning the Outlook data file (OST), select the specific email message you need to extract. Then click the Save Converted File button and choose the file format to save the selected emails.

How to Export an Encrypted OST file to PST?

An error can occur while opening an encrypted OST file, thus resulting in loss of access to the mailbox data. You can export the encrypted OST file to a PST (Personal Storage Table) file to resolve this problem. Stellar's OST PST converter tool exports and converts encrypted OST file to PST file, thereby enabling access to the mailbox data.

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*Free Demo Version allows you to preview all the converted file data.

Find Your Answers

FAQ

  1. Launch Microsoft Outlook.
  2. Open the File tab.
  3. Click on ‘Open & Export’
  4. Now Select the Import/Export option.
  5. Click on ‘Import from another file or file’.
  6. Click on the 'Next’ button.
  7. Select Outlook Data File (.pst)
  8. Click on the Next button.
  9. Browse the file to import & Click on the ‘Next’
  10. Choose Finish.

Now, Microsoft Outlook will start importing the items in your Outlook Data File (.pst) immediately.

The Demo version of the software converts the Outlook OST file and allows a preview of the entire mailbox data.

Yes, Stellar Converter for OST allows you to search for the OST files (Offline Storage Table) stored in any folder, sub-folder, or drive in your system. Use the 'Find Outlook File' feature of the software to locate the OST files.

You would need to convert an OST file into a PST file in any of the following cases:

  • You need to access the emails from a mailbox that is deleted from Exchange
  • You are facing issues while synchronizing Outlook with Exchange Server
  • You need to migrate the email organization to a different platform
  • You need to recreate or rebuild the OST file in case of an Exchange Server crash/disaster
  • You are facing difficulty with Outlook Import/Export Wizard
  • You need to change the location of the offline Outlook Data File (.ost) in Microsoft Outlook
  • You need to move the Outlook OST file to another disk

Or facing an error while accessing OST file –


  • Outlook is using an old copy of your Offline Folder File (.ost). Exit Outlook, delete the .ost file and restart Outlook.
  • Errors have been detected in the file outlook OST.
  • Outlook cannot configure the OST file.

The total time required by the software for converting an OST file into a PST file depends on the OST file size. Stellar Converter for OST takes approximately seven minutes to convert per GB of OST file into PST.

The software can save the converted OST file into MSG, EML, PDF, RTF, or HTML file formats.

If you face any problem during or after an OST file conversion, you can contact the Stellar support team: support@stellarinfo.com

The software is available in two variants – Corporate & Technician. If you only need to convert an OST file into a PST file, then you should go for Corporate. If you want to convert and also compact or split a PST file, you should use the Technician edition. The Technician edition can also export the OST file data to Office 365.

Stellar Converter for OST is available in three different editions: Corporate, Technician, and Toolkit. The Corporate edition is available with a single-device license and can be installed only on a single device or system. The Stellar Converter for OST - Technician and Toolkit editions are available with a Bulk Licensing option. If you choose Technician or Toolkit edition, you can purchase licenses based on the number of devices or systems you have. At a time, you can purchase bulk licenses for Technician and Toolkit editions for 1, 5, 10, 25, 50, 100, 200, or 500 devices or systems. Read More

Yes, the software converts OST file that is not connected to Exchange Server.

Yes, the software guarantees OST to PST file conversion; however, we strongly recommend trying the free Demo version of the software which allows you to preview the mailbox data stored in OST and also converts up to 20 mailbox items per folder. After ascertaining the software's effectiveness, you can activate it with a license key and then convert & save all mailbox items in PST or other file formats.

Yes, you can open the converted OST on another system after saving the OST file in a format such as PST, EML, RTF, or other supported file formats.

The software does not perform any action on the corrupted OST file. It converts the mailbox data in a corrupt OST file in a new PST file, thus enabling access to the OST file data.

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