As an Exchange Server professional, I’ve often been in situations where converting inaccessible or orphaned OST files is critical. Whether dealing with server crashes, or mailbox deletions, having a reliable OST to PST converter tool can be a lifesaver. I recently tested Stellar Converter for OST, a tool specifically designed for such scenarios, and here’s my complete review of the product.
What is Stellar Converter for OST?
Stellar Converter for OST is a professional-grade software designed to convert offline Outlook Data Files (OST) into PST format. It supports the conversion of large, encrypted, and even orphaned OST files, making it a versatile tool for IT admins and Exchange Server professionals.
My Test Setup
Test File:
12GB Standard OST File
Hardware Used:
- Processor: Intel Core i7-12700K
- RAM: 16GB DDR4 (3200MHz)
- Storage: 1TB NVMe SSD (with 500GB free)
- OS: Windows 11 Pro (64-bit)
I wanted to evaluate Stellar Converter for OST’s performance under both typical and challenging conditions.
Performance and Features
1. Conversion Speed
The tool converted my 12GB file under 10 minutes. This speed is impressive, especially for handling large corporate mailboxes.
2. Data Integrity
The software maintained the entire mailbox structure, including:
- Emails with attachments
- Contacts
- Calendar events
- Notes and tasks
The folder hierarchy was preserved exactly as it appeared in the original mailbox, which is critical for enterprise users.
3. Preview and Selective Export
Stellar Converter for OST’s preview feature allowed me to verify the converted data before saving. This included:
- Reviewing emails, attachments, and folders.
- Searching specific messages using filters like “From,” “To,” “Subject,” or “Date.”
I could also selectively export specific items, which saves time during partial recoveries.
4. Handling Large and Encrypted Files
I tested the software on both large and encrypted OST files. Stellar Converter for OST handled them effortlessly, converting to PST without a hitch.
5. Multiple Output Formats
Beyond PST, the tool supports exporting data in:
- MSG
- EML
- RTF
- HTML
This versatility is great for archiving or sharing emails in specific formats.
6. Direct Migration to Microsoft 365
The Technician Edition of Stellar Converter for OST includes direct migration to Microsoft 365. I tested this feature and found it to be seamless, preserving all data and folder structures. This eliminates the need for additional manual steps.
Auto-Split Large PST Files
For large mailboxes, the tool can split oversized PST files into smaller, manageable parts (up to 45GB). This prevents potential corruption and makes handling large files easier.
Batch Conversion
The Technician Edition also allows batch conversion of multiple OST files, which is incredibly helpful for enterprise IT admins managing large-scale migrations.
How It Works: Step-by-Step
Here’s how easy it is to use Stellar Converter for OST:
- Install and Launch the Software: The setup process is quick and straightforward.
- Locate the OST File:
- Use the List Profiles feature for automatic detection.
- Or browse manually to select a specific OST file.
- Convert the OST File:
- Click ‘Convert’ to begin the process.
- Once complete, preview the mailbox items.
- Save the Converted Data:
- Select PST or other desired formats.
- Choose a save location and export the data.
- Import PST to Outlook:
- The newly created PST can be easily imported into Outlook.
Watch How It Works
To make things even clearer, here’s a how-to video that walks you through the process of converting OST files to PST using Stellar Converter for OST. This video covers:
- Installing and launching the software.
- Selecting and converting OST files.
- Saving data in PST and other formats.
- Importing the converted PST into Outlook.
When to Use Stellar Converter for OST
- Convert Inaccessible OST Files:
- If a user’s mailbox is deleted from the Exchange Server but the OST file exists, this tool can retrieve the data.
- During Server Failures:
- If the Exchange Server crashes, Stellar Converter for OST can extract vital data from offline OST files.
- Migration to Microsoft 365:
- The Technician Edition allows direct migration of OST files to Microsoft 365, simplifying transitions to cloud-based systems.
Pros and Cons
Pros:
- High-Speed Conversion: Handles large files and encrypted OSTs efficiently.
- Data Integrity: Preserves folder structure, metadata, and attachments.
- Multiple Export Formats: Supports PST, MSG, EML, PDF, and more.
- Direct M365 Migration: Technician Edition is perfect for cloud transitions.
- Preview Feature: Verifies data before saving.
- Batch Conversion: Ideal for large-scale migrations.
- User-Friendly Interface: Even non-technical users can operate it easily.
Cons:
- Pricing: The Technician Edition is pricey, though its advanced features justify the cost.
- Platform Limitation: Available only for Windows; no macOS support.
- Trial Version Limitation: The free trial only allows data preview, not saving.
Pricing and Licensing
Stellar Converter for OST is available in three editions:
- Corporate Edition: For individuals or small businesses handling single mailboxes.
- Technician Edition: For IT admins, supporting batch conversions and M365 migrations.
- Toolkit Edition: A comprehensive package for conversion, advanced data recovery and repair.
Final Verdict
Stellar Converter for OST delivers on its promises and is an essential tool for IT professionals. Whether you’re converting OST files to PST from server failures, migrating to Microsoft 365, or handling orphaned OST files, this tool gets the job done with speed, precision, and ease.
Would I recommend it? Absolutely. It’s a reliable, user-friendly, and versatile tool that saves time and ensures data integrity.
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