How to Export Outlook OST to PST File Format? DIY Tricks


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OST and PST files perform some specific functions, but sometimes users face issues in accessing their OST data. If there is non-availability in Exchange server then users cannot access their mailbox database. Exchange might face issues such as crash, downtime and few other technical issues. In such a situation, users preferred to convert Outlook OST to PST file format. PST or Personal Storage Table files are supported by Microsoft Outlook to save all the mailbox data. Users cannot directly access OST files in MS Outlook, and converting OST files to Outlook PST is a much challenging task. OST (Offline Storage Table) saves the entire MS Exchange mailbox in offline mode when there is limited connectivity or no internet connection available.

How to Export Outlook OST to PST File Format

The changes made by the user over the OST file will automatically be saved once the internet connection is re-established. PST file saves all the mailbox items including emails, calendars, notes, tasks, etc. In this blog, we will describe the best recommended methods to convert OST to PST file format. We will provide the manual and professional OST to PST Converter Solution.

Before stepping ahead, let’s first understand some reasons to import OST to Outlook PST format.

Reasons to Convert Outlook OST to PST Format

We have mentioned some of the common reasons below for OST to PST Conversion. Go through the needs for migration listed below.

  • Accidental Deletion of Exchange Server Account – If the user has accidentally deleted the Exchange server account then, it is suggested to export OST to PST file format of Outlook.
  • Exchange Server Crash – There might be any reason when Exchange server gets crashed or there is a system failure or virus attack then, users will not be able to connect with the exchange server. Users can avoid such situations by exporting OST to PST.
  • Exchange Server Maintenance – If there is an outage because of Exchange server maintenance, it becomes crucial to have access to the important mailbox items. The business might affect as the downtime can be long enough. So, it is suggested to convert exchange OST to PST format to keep access to the database.
  • Rebuild OST File – Suppose the user wants to rebuild the OST file but there is unsaved data present in the file. In this scenario, users need to import OST file into Outlook PST.

These are a few reasons to convert OST to PST format and to keep the access to the important database. Now we will proceed further to the manual approach to convert OST to PST manually.

How to Convert Outlook OST to PST Manually?

There are manual as well as automated methods available for migration purposes. Here we will discuss the manual steps that will help users to export OST to PST. Before starting the steps, it is suggested to create a copy of the original data as there may be some risk of severe data loss. Once the duplicate file is created, follow the steps provided below.

Method 1: Import/ Export

  1. Sign in to Microsoft Outlook
  2. Click on the File tab.
  3. Select the Import/Export option.
  4. Click on Export to a file.
  5. Press the Next button.
  6. Now Select the Personal File folder (.pst).
  7. Click on the Parent root.
  8. Check on the include subfolders
  9. Browse the path to save the resultant data.
  10. Click on the finish button.

Method 2: Outlook Archive Option

  1. Launch Microsoft Outlook.
  2. Go to the File section
  3. Click on Options
  4. Now, click on the Advanced section
  5. Click on Auto Archive settings
  6. Navigate to the path to save archived files.
  7. Click on the OK button.


  • Complex and more time-consuming process.
  • Unable to convert the corrupt OST data.
  • Technical expertise is required.
  • Huge risk of data loss.

Professional Methods to Convert Outlook OST to PST File Format

As we have seen above, there are several limitations with using the conventional manual approach for OST to PST Conversion. To avoid all the risks and limitations, there are professional automated methods available for users. Users can opt for the free OST to PST Converter or advanced OST to PST converter software available in the market. The professional technique provides a safe and quick conversion process without any difficulties. Users can opt for DRS Best OST to PST Converter Tool which is developed on advanced algorithms. The tool is able to export OST to PST, EML, EMLX, MBOX, MSG, HTML, PDF, Gmail, Yahoo, Thunderbird, Office 365, IMAP, etc. It always maintains the structure and hierarchy of the data. The free OST to PST Converter tool is also available to export 50 emails for free.

Prominent Features

  • Convert Outlook OST to PST, EML, MBOX, EML, CSV, PDF, HTML, Gmail, AOL, IMAP, Thunderbird, etc.
  • Repair OST files that are corrupted due to any reason and convert them to Outlook PST.
  • Recovers Outlook items like calendars, contacts, emails, etc.
  • Supports and converts encrypted OST files.
  • No file size restrictions
  • Provides preview option prior to saving
  • No risk of data loss
  • No technical expertise required.
  • The free OST to PST Converter software version can easily convert the 50 emails per folder for free.


Above in this blog, we have discussed the methods available for users to export Outlook OST to PST file format of MS Outlook. We have provided both manual as well as the automated professional technique for migration. We can now conclude that the conventional manual approach is somewhat risky and takes more process time. So it is highly suggested to use the advanced OST to PST Converter software for an effortless conversion process. Professional utility offers a more quick and accurate migration resultant.


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