How to Convert and Import Items from an Offline Data File (.ost) to Microsoft Outlook 2016

  •   Written By
  • Published on
    March 31st, 2014
  • Updated on
    March 19, 2021
  • Read Time
    5 minutes

Microsoft Outlook has two types of data files (.ost) and (.pst). When the user has an Exchange account and he/she works offline or use the default Cached Exchange Mode then Outlook Data Files (.ost) are used. Outlook Data Files also used for those accounts which user set up with the Outlook Connector (formerly Hotmail). Offline Storage Table (.ost) files always keep copies of items which are saved on a mail server and there is no need to be backed up like .pst files. In this blog, we will know how to import ost file to Outlook and convert into PST format. Follow to the end.

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To Import items Re-Creats an offline Outlook Data File (.ost)

OST Files has copies of Exchange information that’s why it is not necessary to backup .ost files. User can create a new copy at any time. Follow the steps:

Step 1: Click ‘File>>Account Settings‘ twice, and then choose your account from the resulting window.

Step 2: Select ‘Change‘ from the toolbar, and then tick the ‘Use Cached Exchange Mode‘ check the box under Offline Settings.

Step 3: Click ‘Next>> click ‘Finish‘ to create the OST file on your hard drive, and then restart Outlook for your changes to take effect.

Steps to Import items & Convert OST to PST

Step 1: Open the system in which the OST file was created. Disconnect from the network, and then open or restart Microsoft Outlook.

Step 2: Select ‘File’ >> ‘Open & Export‘, and then click ‘Import/Export‘.

Step 3: Click ‘Export to a File>> ‘Next’ >> Outlook Data File (.pst)‘ from the list of file formats, and then click ‘Next‘.

Step 4: Select your email address or choose the folder you want to export data from, and then click ‘Next‘.

Step 5: Click ‘Browse‘, and then navigate to your preferred save location.

Step 6: Enter an identifying name for your backup file, and then click ‘OK‘.

Step 7: Select ‘Replace Duplicates With Items Imported‘, ‘Allow Duplicates to Be Created‘ or ‘Do Not Import Duplicate Items‘, according to your preferences. Click ‘Next‘, and then click ‘Finish‘.

Step 8: Type an optional password with which to secure the data, and then click ‘OK‘ to export your data.

Step 9: Sign on to the other computer or account, and then open Microsoft Outlook.

Step 10: Select ‘File>>Open & Export>>Import/Export‘ to run the ‘Import and Export‘ wizard.

Step 11: Select ‘Import From Another File or Program’ >> ‘Next’ >> Browse’ and then go to the network or removable drive containing the PST file you created.

Step 12: Choose the appropriate file, click ‘Next‘, choose the folder to import data from or use the default selection to import the contents of the entire file, and then click ‘Finish‘.

Note: Above information applies to Microsoft Outlook 2013. It can differ slightly or significantly with other versions.

Automated Solution to Import OST File to Outlook 2016

The OST to PST Converter by SysInfoTools is compatible with all the versions of Microsoft Outlook as well as Windows. It exports multiple offline OST files to Outlook PST format. The OST files to PST conversion tool comprises with so many unique features that make it an exclusive product among others like Bulk conversion facility, Search, Preview, Filter, Fastest Conversion, etc.  In the case that your offline Outlook (.ost) data files are corrupted, you can still export them as our software supports the damaged or corrupted OST files and converts them into desired file formats like PST, DBX, EML, MBOX, Archive, and MSG.

See the working process of this tool step by step:

Step 1: Launch the software >> open the OST file. Click Browse and select the OST file.

Step 2: After sometimes, the scanning process will be completed successfully. Click OK.

Step 3: Click the email item to check its preview. Select the mailbox folders, and click Save.

Step 4: Click on the Browse to select a location to save the new PST file. Click OK.

Step 5: Within a few minutes, the saving process is completed. Click OK.


We hope that the user will now be able to Import OST file to Outlook. Try the above methods to convert items from .ost files as well as try the suggested tool, if didn’t get rid of the problem. This tool has a wide supporting option on the latest version of the Windows. Difference Between OST and PST l What Is OST & PST Files?

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