What is included in Stellar Repair for Outlook?

Repairs corrupt PST – Fixes damaged or oversized files completely
Recovers all items – Emails, contacts, calendars, tasks, notes, attachments
Recovers deleted items – Restores accidentally emptied emails and folders
Multiple save formats – Exports to PST, MSG, EML, PDF
Core Capacity – Repairs 50 GB PST files without limit
Important – Office 365 export needs Technician or Toolkit

What are the main benefits of Stellar Repair for Outlook?

Stellar Repair for Outlook is a Windows tool that repairs corrupt or oversized PST files and rebuilds the mailbox into a new, working file. It recovers emails, attachments, contacts, calendars, tasks, notes and journals, even in cases where the built-in ScanPST utility gives up.

Works after ScanPST – Recovers files Microsoft's ScanPST cannot
Read-only repair – Keeps the original PST file untouched
Selective recovery – Filter by sender, date or folder
Resume anytime – Save scan as DAT to continue
Batch repair – Fixes multiple PST files at once
Preview first – Inspect recoverable items before saving

Data loss is expensive: How backups help you avoid outages
For more background on backup planning, read our guide:

What does Stellar Repair for Outlook do?

It repairs corrupt or damaged Outlook PST files and writes the recovered mailbox to a new PST, without any file size limit. The tool restores emails, attachments, contacts, calendar entries, tasks, notes and journals while keeping the original folder hierarchy intact. Deleted items found during the scan are highlighted in red, so you can pick out messages emptied from the Deleted Items folder. Because it reads from a copy of the file, your original PST is never altered during the process.

Which formats can it save recovered data to?

The Professional edition saves repaired data to PST, EML, MSG, RTF, HTML and PDF, which lets you open recovered messages outside Outlook in a browser or PDF reader. The Technician and Toolkit editions add MBOX export and can send the repaired mailbox straight to a Microsoft 365 account or a live Exchange Server. Only the Toolkit edition converts inaccessible OST files into PST. Choose the format based on where the data needs to land: keep PST for re-import into Outlook, or use PDF/HTML for archiving and sharing.

What is the difference between the Professional, Technician and Toolkit editions?

All three editions repair corrupt PST files and recover deleted mailbox items, but the higher tiers add migration and file-management tools. The Technician edition adds direct export to Microsoft 365 and live Exchange plus PST split and compact, which matters when you are moving large mailboxes to the cloud. The Toolkit edition is the 8-in-1 package that also converts OST to PST, merges multiple PST files and recovers lost Outlook passwords. Pick Professional for one-off recovery on a single mailbox, Technician for cloud migration work, and Toolkit when you regularly handle orphaned OST files or many separate PSTs.

Does it help when ScanPST.exe fails to repair a PST?

Yes, this is the main reason most users buy it. Microsoft's built-in ScanPST.exe can freeze or stop on heavily corrupt or very large files, and it may discard items it cannot read, which risks permanent loss. Stellar Repair for Outlook works on a copy of the file, applies no size limit, and recovers items ScanPST drops, including messages from the Deleted Items folder shown in red. If you have already run ScanPST several times without a clean result, a dedicated repair pass with this tool is the safer next step before the data degrades further.

What should users check before choosing Stellar Repair for Outlook?

Confirm three things first: it is a Windows-only application (Windows 11, 10, 8.1 and 8, 64-bit), so Mac or Linux users need a Windows virtual machine. A licensed Microsoft Outlook must be installed on the same machine to write the recovered data back into a new PST file. The Professional edition does not export to Microsoft 365 or Exchange, split or compact PSTs, or convert OST files, so cloud migration and OST work require the Technician or Toolkit edition. Match the edition to the actual task to avoid paying for a tier whose extra tools you will not use.

Frequently asked questions about Stellar Repair for Outlook

Can it repair encrypted or password-protected PST files?

Yes, the tool repairs encrypted and password-protected PST files and recovers their mailbox contents during the same process. This is useful when a protected archive becomes corrupt and Outlook can no longer open it.

Does the trial version save the repaired PST file?

No. The trial scans the corrupt PST and previews every recoverable item, but saving is disabled. You need the full version to write the repaired mailbox to a new PST or any other supported format.

Does it keep the original folder structure after repair?

Yes. The repaired output preserves the original folder hierarchy of the mailbox, so inbox, subfolders, sent items and custom folders return in their proper place rather than as a flat list.