Best way to Export OST file in PST File?

1. Open Outlook and go to File > Open & Export > Import/Export 2. Choose “Export to a file” and then select “Outlook Data File (.pst)” 3. Select the folders you want to export 4. Choose a location to save the PST file and complete the process This is the easiest and free method. If the OST file is not connected to Outlook, you can use a third-party tool such as OutlookFreeware OST to PST Converter. It helps convert OST files into PST format without losing emails or attachments

The "Best" Method Depends on Your Scenario: Method Best For Key Requirement Pros Cons 1. Manual Export via Outlook Most users with access to the original email account/server. Active Outlook profile connected to the original Exchange/M365 account. Native, reliable, and free. Preserves all data integrity. Requires live server connection and original account access. 2. Professional Converter Tool Recovering data from orphaned/disconnected OST files. The OST file is not corrupt. Powerful & easy. Handles orphaned OSTs. High recovery rate. Costly for one-time use. Free versions have limits. 3. Free Converter Tool Users with a small amount of data to save or for testing. A functioning OST file. Free. Good for small jobs. Item limits per folder. Can be slow. Potential data loss risk. Detailed Guide for Each Method Method 1: The Native & Recommended Way (Using Outlook) This is the best and most reliable method if you can still access the original email account (e.g., your Office 365/Exchange mailbox is active). Steps: Connect OST in Outlook: Ensure the OST file is already the active data file in your Outlook profile. (It usually is if you're using a connected account). Open Export Menu: Go to File > Open & Export > Import/Export. Choose Export: Select "Export to a file" and click Next. Select PST: Choose "Outlook Data File (.pst)" and click Next. Select Mailbox: Choose the top-level mailbox folder you want to export. To get everything, select the root of your mailbox (e.g., your email address) and check the box for "Include subfolders." Choose Save Location: Click Browse to choose where to save the new PST file and give it a filename. Finish: Click Finish. You can optionally set a password for the PST file. Why this is the "Best" method when possible: It uses Outlook's native functionality, guaranteeing the highest data fidelity and costing nothing. Method 2: The Best Way for "Orphaned" OST Files (Using a Professional Tool) An "orphaned" OST is one that is no longer connected to its original server (e.g., your Exchange account was deleted, or you lost network credentials). In this case, Outlook cannot help you, and a third-party tool is the only viable option. Recommended Professional Tool: Stellar Converter for OST or Sysinfo OST to PST Converter (Professional versions). Why they are the "Best" for this scenario: No Server Needed: They can open and scan the orphaned OST file directly. High Recovery Rate: They are designed to handle corrupt OST files to some extent. Previews Data: You can see all recoverable items before purchasing. Bulk Export: Saves everything—emails, attachments, calendars, contacts—into a new PST. Process: Download and install the professional tool. Run the software and point it to your OST file (C:\Users\\AppData\Local\Microsoft\Outlook). Let it scan the file. Preview the recovered mailbox data. Use the "Save" or "Convert" button to export everything to a PST file. Method 3: The Free Tool Alternative If you have a small, non-orphaned OST file and don't want to spend money, free tools can be a temporary solution. Recommended Free Tool: Sysinfo OST to PST Converter (Free Edition) The Catch (Limitations): It will only export 25 items per folder. It is intended as a trial to demonstrate the software's capability before you buy the full version. Process is similar to professional tools: Select the OST file. Preview the data. Choose the "Free Export" option to save the limited PST. Final Recommendation If you have a live Outlook profile: Use Method 1 (Manual Export via Outlook). It is the undisputed best way. If your OST is orphaned or disconnected: Use Method 2 (A Professional Converter Tool). It is the only safe and effective "best" way. If you only need a few emails for free: Try Method 3 (Free Tool) as a last resort. ⚠️ Important Precaution: Before using any method, make a copy of your original OST file and work on the copy. This prevents accidental data loss if something goes wrong during the conversion process.

The most reliable free method is to use Outlook’s Import/Export Wizard: File → Open & Export → Import/Export → Export to a file → Outlook Data File (.pst) → select folders → choose location → Finish

Best Practice Recommendation If the OST is still accessible in Outlook → use the manual export method (free, official, no risk). If the OST is orphaned or Outlook can’t open it → use a professional OST to PST converter tool.

The best and most reliable way to export an OST file to PST is by using a professional OST to PST converter tool like MailsDaddy OST to PST Converter. This tool ensures data integrity, supports corrupted or orphaned OST files, allows individual contacts and calendars conversion and allows bulk and selective export. The tool does not require any Outlook installation and works as an independent converter. it is compatible with all Windows OS. A free trial version of the tool is also available which allows upto 20 files conversion per folder for free.

To Export OST to PST  File Format?Then I will recommend you can also try ZOOK OST to PST Converter.The ideal option for users is to convert their complete data set from OST to PST format. OST emails, contacts, notes, calendar events, tasks, to-do lists, and much more are effortlessly exported into PST format. Users are able to convert corrupted, orphaned, and IMAP OST files into PST format by using this software without exerting additional effort. 

 

Download and use it Now:  https://www.zooksoftware.com/ost-to-pst/