Convert PST to OST

Understanding PST and OST file formats

PST (Personal Storage Table) and OST (Offline Storage Table) are both file formats used by Microsoft Outlook to store mailbox data. PST files are used for archiving and storing emails, contacts, and calendar items locally, often for POP3, IMAP, or web-based mail accounts. OST files, on the other hand, are used to store a synchronized copy of mailbox data from an Exchange server, allowing users to work offline and sync changes when reconnected.

Why convert PST to OST?

Converting a PST file to an OST file is useful when you want to import archived or backed-up emails into an Exchange or Office 365 account for offline access. Since Outlook does not provide a direct way to convert PST to OST, a manual or third-party solution is required.

How to convert PST to OST

There is no direct conversion tool built into Outlook for PST to OST. However, you can achieve this by importing the PST data into an Exchange or Office 365 account, which will then create an OST file automatically. Here are the steps:

1. Open Microsoft Outlook and configure it with your Exchange or Office 365 account.
2. Go to File → Open & Export → Import/Export.
3. Select Import from another program or file and click Next.
4. Choose Outlook Data File (.pst) and click Next.
5. Browse to your PST file, select it, and choose the desired import options.
6. Select the Exchange or Office 365 mailbox as the destination and complete the import.
7. Outlook will sync the imported data to the server and create an OST file for offline access.

Best software for PST to OST conversion

For a more automated process, third-party tools like Stellar Converter for PST or KDETools PST to OST Converter can help. These tools allow you to convert PST files directly to OST format, preserving folder structure and data integrity.

• Stellar Converter for PST: User-friendly interface, supports bulk conversion, and maintains data integrity.
• KDETools PST to OST Converter: Offers advanced filtering, preview options, and direct conversion.

Summary

While Outlook does not natively support direct PST to OST conversion, you can import PST data into an Exchange or Office 365 account to generate an OST file. For more convenience and advanced features, consider using specialized third-party software.