Microsoft Outlook relies on OST (Offline Storage Table) files to let users access emails even when the Exchange Server connection is unavailable. However, issues such as corruption, accidental deletion, or synchronization errors often render an OST file inaccessible. This can be a nightmare for professionals who need urgent access to their mailbox data.
The good news? With the right approach and the assistance of a reliable OST to PST converter software, you can effortlessly repair and convert an inaccessible OST file into a PST format. This guide walks you through the process step by step.
Why Convert OST to PST?
Converting OST files into PST format ensures that you can:
-
Recover and access important emails without Exchange Server.
-
Migrate mailbox items to another Outlook account.
-
Safeguard data against server crashes or corruption.
-
Restore deleted emails and attachments.
Step 1: Identify the Issue with Your OST File
Before conversion, confirm why the OST file is inaccessible. Common causes include:
-
Exchange Server downtime or crash.
-
Sudden system shutdown during synchronization.
-
Virus or malware intrusion.
-
Oversized OST file exceeding storage limits.
Step 2: Attempt Manual method to Repair OST file
Microsoft provides an inbuilt utility — ScanOST.exe (in older versions) and ScanPST.exe (Inbox Repair Tool). While it can fix minor issues, it has significant limitations:
-
Cannot handle severe corruption.
-
Might fail with oversized files.
-
Does not guarantee full data recovery.
Step 3: Use a Professional OST to PST Converter
Manual techniques are often insufficient, which is why professionals rely on third-party tools like ATS OST Recovery software. This advanced solution allows users to repair damaged OST files and perform seamless conversion into PST format.
Key Benefits of Using ATS OST to PST Converter Software:
-
Recovers emails, contacts, calendars, journals, and attachments.
-
Handles both minor and severe corruption.
-
Maintains original folder hierarchy and metadata integrity.
-
Offers selective conversion options.
-
Compatible with multiple versions of Outlook and Windows.
Step 4: Convert OST to PST with ATS OST Recovery Software
Follow these simple steps:
-
Download and Install the free OST to PST Conversion tool provided by ATS.
-
Launch the Software and browse the inaccessible OST file.
-
Scan the File to detect corruption and preview recoverable mailbox items.
-
Choose Conversion Format – select PST as your output option.
-
Save the File at your desired location.
-
Import the PST File into Microsoft Outlook to regain access.
Step 5: Ensure Data Safety Post-Conversion
Once your OST is successfully converted into PST, take the following precautions:
-
Regularly back up your Outlook data.
-
Keep antivirus software updated.
-
Avoid abrupt system shutdowns during synchronization.
-
Use reliable hardware and stable network connections.
Final Thoughts
An inaccessible OST file doesn’t have to mean permanent data loss. With the right tools, such as ATS OST to PST Converter software, you can not only repair corrupted files but also ensure smooth data migration. While manual repair may work for minor issues, a third-party tool like ATS OST Recovery software guarantees comprehensive results.
