Computers and Technology

How to Combine PST Files Without Duplicates? – Simplest Approach

Combine PST Files Without Duplicates

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Do you have a lot of PST data files? Do you want to combine PST files without duplicates? If so, this blog will explain how to merge Outlook PST files into one.

Microsoft Outlook is the most popular email client. Save all data in PST format. Outlook has the option to create multiple accounts. Managing multiple PST files regularly in MS Outlook is always a headache. Therefore, it is better to combine all the PST files into one file, but the question is how to do it. Read on for this blog. We will show you the easiest and free technique to combine Outlook PST files without losing any data.

First, let’s talk about why you need to merge PST files. Then we provide you with methods to recommend solutions suggested by experts. After that, we will talk manually.

Why Need to Combine Outlook PST Files

As we all know, Outlook does not provide an option to combine multiple PST files at once. So let’s see what are the reasons for merging PST files.

  • In order to prevent loss and deletion by mistake,
  • Combine backups from multiple Outlook account into one.
  • If you have a lot of old and archived PST files, it will cause work clutter and slow down MS Outlook.
  • Move to another email client and server.

Automatic Solution to Combine PST Files Without Duplicates

If the traditional method doesn’t work, or you encounter any error using the above method. Then you can choose the most secure and reliable professional tool, Free PST Merge Software. The user interface of this software makes it easy to merge PST files. This tool uses advanced technology and provides users with advanced features, you can easily join several PST files at once. This software is able to combine all email items from the PST file with email. You can manually select items such as calendars, tasks, contacts, journals, and more. It is designed with advanced algorithms to help users combine these elements easily.

Facility to Test Equipment Functionality Before Investing

The PST File Merger Tool offers a free demo version feature that helps assess the value of the tool before investing and purchasing the licensed version of the tool. Free trial version first 15 items of each PST file folder. Once the functionality and value of the device is assessed, users can go ahead and invest in a licensed version that combines data from unlimited PST files into a single PST.

  • Download the PST File Merge tool, install it and Launch it on your System

Download PST Merge Software

  • Select the PST files or folders

Select Add File or Folder

  • Choose an option: Merge or Join PST

Choose Merge or join Options

  • Next, select the option to combine the PST files into a new PST, existing PST or Outlook profile

merge in existing

  • Select the items you want to merge, such as Mail, Notes, Contacts, Calendar, etc.

select items

  • Check the Skip Duplicate Items option to remove duplicates and select Next to continue

remove duplicate

  • Click the Next button to start merging Outlook .pst files into one process

merge pst files successfully

Manual Task to Combine Outlook PST Emails Without Duplicates

Step 1: Generate a New PST file

  • Launch MS Outlook on your computer to merge Outlook PST files
  • A dropdown will appear, select more items


  • A dialog will appear, select Outlook Data File


  • Next, browse to the location to save the file and give it a new name, then click the OK tab


  • Your New PST file has now been created.


#2: Import All Items From PST File to New

  • In the same email client, click File >> Open & Export >> Import/Export


  • This will open the Outlook Import and Export window, where you have to select the Import from another program or file option and click Next to combine the PST filesimport-from-another-program-or-file
  • Now go ahead and merge the Outlook PST files into one file by selecting the Outlook Data File (.pst) option and click Next

Outlook Data File

  • Click the Browse button to select the PST file and select the Do not import duplicates option


  • Select a folder and tick Include subfolders


  • Click Finish to start the execution process

Important Note: You will need to repeat the above process for each PST file you need to merge with Email, Contacts, Contacts, and Calendar.


We have found the best way to combine PST files without duplicates in this blog. You can opt for a manual process if you are technically sound; Otherwise, we offer another easy software solution to combine Outlook PST emails directly and quickly.

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