How to Combine Multiple Outlook PST Files Into One PST? – Free Tutorial

Carl Wilson | Last Modified: October 20th, 2020 | Outlook, Tips

Nowadays, Outlook is a widely used desktop-based email client application. Users have several accounts in Outlook application and users are very frustrated managing Outlook data files. For managing data, users want to combine multiple Outlook PST files into one PST file. To meet all user requirements, we have come with the best and free tutorial. In this blog, we will show you how to combine 2 PST files and several PST files into a single file using manual and automated solutions.

User Query – How to Combine PST Files Without Duplicates?

“After creating several backups at different time, I have multiple Outlook archive files. Now there is a lot of data duplication in different archives and I want to combine Outlook archives into a single PST file. Can someone tell me how can I do the same? Any help will be appreciated. Thanks.”

My Outlook account contains several PST files as I upgraded from old to new version of Outlook. Now, it is difficult to manage PST files and want to merge them into a single file. Is it possible to combining multiple PST files into one without duplicates? Please guide me with a reliable solution.

Smart Way to Combine Multiple Outlook PST Files into One

To effectively combine PST files together without any issue of data loss, we recommend download Outlook PST File Merge software from SysTools. The reason behind suggested this tool is that it is completely secure and provides a complete solution in just a few minutes. It is tested by the experts and has capability to preserves the originality of data even after the merging process.

Steps for Combining multiple PST files into one PST are as follows;

Step 1. Free Download and Launch PST Merge tool on the system.


Step 2. Select PST files that you want to merge.

Merge PST Files

Step 3. Select option: Merge or Join which is suitable for you.

Merge or Join PST Files

Step 4. In the next section, choose Merge in a New PST, Existing PST or an Outlook Profile.

Combine Multiple Outlook PST Files into One PST

Step 5. Check the Split PST File Size, Exclude Deleted Items, and Skip Duplicate Items.

Merge Several PST Files

Step 5. Click Next.

Combine Multiple Outlook PST Files Into One PST

Done! This is how you can merge PST files in Outlook 2019, 2016, 2013, 2010.

The software supports the PST file of all Outlook versions and works on all editions of Windows OS. With this tool, you can easily combine Outlook archives with all attachments. It supports combining ANSI and UNICODE PST files in a single UNICODE file. There is no issue if your data files are password protected, the software is able to join password protected PST files without entering password.

Manually Combine Multiple Outlook PST Files into One PST

There is no direct method for combining multiple PST files into one. However, some manual techniques can be helpful for accomplish this task. The manual process consists of two sections. First, create a new PST file after that import all Outlook data files into a newly created blank PST file.

Phase 1. Create New Blank PST File

Follow the mentioned steps to create a new PST file in Outlook.

  • Click on New Items >> More Items >> Outlook data file
Create New PST File
  • Choose the location where you want to store new blank PST and provide the name for the file.
Create PST File
  • Click OK and a new PST file is successfully created.

Phase 2. Import All Outlook PST Files Into New PST For Merging

To import all the Outlook data files into a newly created blank PST file, follow the given below steps.

  • Click on the File >> Open >> Import
Import PST File
  • Now, the Import/Export window will appear, choose import from another program or file option
Import PST File
  • Next, Import a file window will appear, here select the Outlook data file (.pst) option
Import Outlook Data File
  • Click on the Browse button to select the desired location and click on Do not import duplicates box
Combine Multiple Outlook PST Files into One PST
  • Click on the Include the subfolders and import items into the same folder checkbox. In the end, click on the Finish button.
Merge Several PST Files

Note:- The manual process is completely fine if you want to combine 2 PST files Outlook. You must repeat the import steps for each PST file that can be quite lengthy.

Final Words

To manage PST files in one place, we explained the complete process of how to combine multiple Outlook PST files into one PST file. Here, we discussed manual and smart ways to combine PST files without duplicates. Easily choose one method which is suitable to fulfill your needs.