How to Merge Multiple Archive PST Files? – Step by Step Manual Guide

Author | November 26th, 2019 | Outlook

Almost all Outlook users have thousands of PST files that are very difficult to manage in a simple manner. Sometimes, users are exposed to data corruption, accidental deletion, improper data management, and performance issues with Outlook due to a large number of PST data files. To organize and manage multiple PST files, it is a good idea to merge them into a single file. In today’s write up, we will discuss one of the most successful and best ways to merge multiple archive PST files into one file. Read on and find the right solution to merge archive PST files.

If the Outlook mailbox is large, users can move old items to an archive, a separate Outlook data file (.pst), which you can open at any time from Outlook. Now, users have multiple archive files and need to combine PST archive files into a single one. It is easy to archive items, but how to merge PST files which are in an archive folder, this is the big question for users. In the following section, we are going to explain the whole process of how to combine multiple archive .pst files.

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Why Merging PST Files is Beneficial?

It is complicated to manage multiple PST files. However, merging multiple PST files into one is the best option to handle. Here are some benefits for merging PST:

  • Avoid data loss or accidental deletion issues
  • Save time by avoiding every file being opened repeatedly
  • Avoid sharing files one at a time
  • Maintain the performance of Outlook application
  • Access data from multiple accounts in one place

Method to Merge Multiple Archive PST Files

To merge archive PST files, it is recommended to create a new PST file and then import all archive PST files into the newly created file. Perform the below steps to complete this task.

Part 1: Create a Blank New PST File in Outlook

  • In Outlook, click New Items and select More Items >> Outlook Data File
Create New PST File
  • Select the location to save the new PST file and also give it a name according to your choice.
  • In the end, click OK.

Part 2: Import All Archive Files Into Newly Created Blank PST File

  • Again Open Outlook. Click on the File tab and select Open & Export >> Import/Export
Merge Archive PST Files
  • Select the “Import from another program or file and click Next
combine PST archive files
  • Select the option “Outlook Data File (.pst)” and click Next
merge 2 outlook archive files
  • Now, Browse the file which you want to import and select “Do not import duplicates“.
combine multiple archive .pst files
  • Check the “Include subfolders” and “Import items into the same folder in” boxes
Merge Multiple Archive PST Files
  • Click Finish and that’s it.

This is the free manual process that can be performed to merge archive PST files to other PST files.

Are There any Limitations With Manual Method?

Yes, the manual process has some limitations. The whole process is very time-taking and tedious. You must repeat the import method to accomplish the process to combine PST archive files. With this method, there is a possibility that data may be lost or damaged.

Instant Method to Merge Multiple Archive PST Files

If you want a quick way to combine multiple archive .pst files, you must go with the Outlook PST Merge Tool. This is an advanced utility that provides the facility to merge 2 or multiple archives without file size and data loss problems. You can download the tool for free to test its effectiveness. The software comes with a simple and friendly interface that is helpful even for non-professional users.

The application provides multiple features and benefits. Some of the highlighted features are-

  • Merge archive PST files without size and data loss issues
  • 100% secure from virus or malware attack
  • Supports the PST file of Outlook 2019, 2016, 2013, 2010, 2007, etc.
  • Two different merging options: Join PST, and Merge PST
  • Helpful to combine multiple archive .pst files without duplicate items
  • Merge Outlook folders: Inbox, Contacts, Sent Items, etc., with the same name.
  • Supports to join or merge Outlook PST files to new PST, existing PST or Outlook profile
  • Remove duplicates from Outlook Mail, Contacts, Calendars, Tasks, Notes and journals

Steps to Combine PST Archive Files Securely & Effortlessly

Step 1. Download and start the software. Add PST files or folder to merge multiple archive PST files

PST Merge Tool

Step 2. Select Merge option from the list

Merge Archive PST Files

Step 3. Next, choose to Merge all Folders or Merge Only Selected Folders

Merge Folders in Outlook

Step 4. Select the option Merge in a new PST, Existing PST or Outlook Profile according to your need

Merge Multiple Archive PST Files

Step 5. Select the items you want to merge like Mail, Calendar, Contacts, Tasks, Journals, and Notes.

Merge Outlook Data Files

Step 6. In the Advanced Options, check the required options as per your requirements. Check the Skip Duplicate Items box to remove duplicate Outlook items.

Remove Duplicate Outlook Items

Step 7. Now, click on the Next button to begin the process.

Merge PST Archive Files

This is the simplest way to combine Outlook archives quickly without having to worry about the size and original data formatting.


Creating archive files is useful, but managing these files is a very complicated and hectic task. To simplify this, merge archive PST files is the best solution to manage all the files in one place. Here we have explained the manual and automated method to merge multiple archive PST files. You can choose any method that meets all your needs. Make sure you use a safe and simple solution that will not affect your data.