OST to PST Converter

Outlook refuses to open an OST whose mailbox is gone. We read it anyway — orphaned, corrupt or hundreds of gigabytes — and hand the mail back as a working PST.

When you do not need us

If Outlook still opens with that account, export it yourself in ten minutes: File → Open & Export → Import/Export → Export to a file → Outlook Data File (.pst). It is free and we would rather tell you than sell you something.

When Outlook cannot do it

Orphaned OST

The employee left, the Exchange or Microsoft 365 mailbox was deleted, or the Outlook profile is gone. Outlook will not open an OST that is not tied to its own mailbox — there is no setting that fixes this.

Corrupt or unreadable OST

scanpst.exe repairs PST files only. A damaged OST has to be read at structure level and rebuilt folder by folder.

Very large mailboxes

9 GB, 50 GB, 99 GB, years of attachments — free trial converters stop at 25 mails per folder. We process the whole file and return the complete mailbox.

Free OST health check

Upload an OST or PST up to 200 MB and see in seconds whether it is readable, how many folders and mails it holds, and where it is damaged. The file is deleted the moment the report is made.

Files above 200 MB are handled at the lab, whatever the size — we routinely process mailboxes of tens of gigabytes — the browser is not the right place to move them. Call us and we will collect it.

How the conversion works

1

You send the OST

Drive, cloud link or in person at Rahatani. Large files welcome.

2

Free diagnosis

We tell you exactly what is recoverable before you pay anything.

3

Conversion

Mail, contacts, calendar and attachments rebuilt with the folder tree intact.

4

You get a PST

Opens directly in Outlook. We check it opens before handover, then wipe our copy.

Outlook says the OST cannot be opened?

Bring it to DataExpert, Rahatani, Pune — or call and we will guide you on sending it.

98601 90235

Questions people actually ask

Can I convert OST to PST free myself?

Yes, if Outlook still opens that mailbox: File → Open & Export → Import/Export → Export to a file → .pst. You need us only when the account or profile is gone, or the file is damaged.

Does scanpst.exe fix an OST?

No. scanpst.exe repairs PST files only. An OST has to be read at structure level.

The mailbox was deleted from Microsoft 365. Is the mail gone?

No. The OST on the laptop still holds the mail. That is exactly the case we handle most often.

Is my mail confidential?

The free check reads folder names and counts only, and deletes the file straight after. Lab work runs on isolated machines and our copy is wiped after handover.

How much does it cost?

Diagnosis is free. Conversion is quoted after we see the file — it depends on size and damage. No data, no fee.