Merge Two PST Files Without Duplicates – 2020 Best Solution

Summary: This blog describes the tried manual method to merge two PST files without duplicates in Outlook 2019, 2016, 2013, 2010, and so on. After reading the following blog, you will defiantly able to merge PST files into one.

Email client applications are most important for communication and data exchange. Microsoft Outlook plays an important role worldwide as a desktop-based email client application. Outlook offers the possibility to export the data and save it in the PST file format. The user can easily export emails, contacts, notes and other data to a PST file. For many reasons, users now have multiple PST files and are not managing them properly. Multiple PST files experience data corruption that affects Outlook performance. It is therefore imperative for data management to merge Outlook PST files into one.

How to Merge Two PST Files Without Duplicates?

Outlook allows users to import and export data but does not have an inbuilt option to merge them into one. But you can use some indirect methods to do this. First, you have to create a new blank PST and then import all existing PST files into the new one.

Note: Please make sure that you have a backup of all PST files before proceeding to these methods. Your data may be lost or corrupt.

Step 1: Create PST File in Outlook

  • Open Outlook, click on New Items and select More Items >> Outlook Data File
  • Mention the location to save the PST file and give a name.
  • Click OK.

Step 2: Import Existing PST Files into Newly Created File

  • Open Outlook and click on the File menu.
  • Click Open & Export option and select Import/Export
  • Select Import from another program or file
  • Select Outlook Data File (.pst) and click Next
  • Click on Browse and select the PST file to import.
  • Under options, select the Do not import duplicates option and click Next.
  • Select the required folder and include subfolders.
  • Select Import items into the same folder in and click Finish.

This is the manual way to merge two PST files without duplicates into one using Export/Import wizard. But this is not a successful method because this is very time-consuming and requires technical expertise.

Alternate Way to Merge PST Files Into One

If you feel that the above mentioned manual method is difficult to access and you want a safe solution, then you can go with alternate solutions like PST Merge Software. This will allow you to merge multiple PST files into one without duplicates and size limitations. It offers to merge Outlook folders with the same name with complete accuracy. One can easily merge two inbox folders into one with no duplicates. The tool provides three different options such as merge Outlook PST files into a new PST, existing PST or Outlook Profile.


We explained above the manual method to merge two PST files without duplicates. The manual method also has some limitations. Therefore, we also mentioned an alternative solution to merge PST files into one. Now, it’s over to you. Choose the secure solution to merge your Outlook data files.

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