Read time 10 minutes

There are thousands of Outlook users out there, and many are using the email client since it was released for the first time. The famous email client has now become the first choice of both businesses and individuals.

Many users like to store mail items in different Outlook accounts. But when several PST files are lying around, it is hard to manage PST files. Hence, in this article, we are going to guide you through the methods of merging multiple Outlook PST files. Our target will be to merge the files and shift all the data to a single file. But we also need to merge PST files without harming or losing the PST file data. Such efforts will be carried out for quick file accessibility, easy management of files, reducing risks of file loss, easy PST migration, backup, archiving in the future, and more such advantages.

Therefore, the proper solution to this mess would be a single PST file with all your valuable data inside. Apart from that, there are some other reasons to merge Outlook PST files. But the question arises, how would you merge all PST data files into a single Outlook PST file. As, there are chances that you mess up and lose your mailbox data, and it might harm you in many ways.

In this article, we are going to guide you through the methods of merging multiple Microsoft Outlook PST files and shift all the distributed data to a single file, but without either harming or losing the PST file data.

Instant Solution

To Merge or Join multiple Outlook PST files, try Kernel Merge PST Software. You can merge all items of PST files, including emails, contacts, calendars, tasks, etc.

Why Merging PST Files?

Before moving towards the methods to merge PST files, let’s know why it is important to merge PST files. Everyone has different motives to merge Outlook PST files, but there are a few common reasons why a user might want to merge multiple PST files together. So, here we are mentioning the situations where merging PST files will be the best possible solution.

  • You may need to merge PST files when you are combining your old accounts.
  • Merging PST files is the best option when you are generating backups.
  • If you are planning to merge your social, personal, or work related accounts together, the merging is the best way out.
  • If you are planning to switch to some other service, let’s say Exchange, then merging can be helpful.
  • If you are going to receive files from a team, family member, an organization or from any other group of people, merging is the easiest way to handle all that data in one PST.

Now we know why merging is a better option in many scenarios. Sometimes, managing multiple PST files can be very difficult. And a proper solution to this issue would be a single PST file with all your valuable data inside. Apart from the above-mentioned reasons, there would definitely be some other reasons to do so. But the question arises, how would you merge all PST data files into a single Outlook PST file? There are chances that you mess up and lose your mailbox data, and it might harm you in many ways. So, to merge your PST files safely, with their integrity intact, keep reading this blog.

Merge PST Data Files Manually

The manual method is not straightforward; it is a two-step process.

Step 1: Create a New Outlook PST File
  1. Open Outlook,
  2. Click on Home tab, click New Items, click More Items > Outlook Data File.
    Click on Home tab
  3. Browse for the path to save the file, give it a name, and click Ok.

A new Outlook PST file is now created.

Step 2: Import Outlook Data to New PST file

In this step, the data from existing PST data files will be transferred to the new file created in Step 1.

  1. Open Outlook, and click on the File tab.
  2. Click on Open & Export > Import/Export.
    Click on Open & Export
  3. Select Import from another program or file; click Next.
    Select Import
  4. Select Outlook Data file (.pst) and click Next.
    Select Outlook Data file
  5. Browse the PST data file to import and click Next.
    Browse the PST data

    Note: Select between the options given in this step as per the need (shown in the screenshot above).

  6. Select the folder(s) you wish to import to the new PST data file.
    Note: Do not forget to add a checkmark on sub-folder(s) in case of partial selection of folder(s).
  7. Click Finish.

Importing from old Outlook PST data file is successful, but Step 2 has to be repeated to complete the migration from multiple PST data files. Above, the data is imported from a single file only, though the iterative count of Step 2 would depend on the number of PST data files you have from which you wish to import data into a single Outlook PST file. This makes this process of merging multiple PST files a hectic and long procedure that can get fail due to human errors. An ample amount of time is needed to complete this merging successfully.

Merge Outlook PST Files Instantly

The manual method of merging PST files into one is quite complex, includes numerous steps, and requires full user attention; otherwise the chances of data loss, file corruption/damage would increase, which would affect the workflow and cost precious time & money.

Thus, for saving both time & money in addition to avoiding the chances of miss-happenings, preferring a professional solution is the best option.
Kernel Merge PST is a professional tool that enables to merge of multiple Microsoft Outlook PST data files into one PST file directly.
Kernel Merge PST
Kernel Merge PST tool offers ease of usability to the extent that anyone can use the tool without any advanced technical knowledge. Navigation through the menu options & other sections is of no effort; the GUI reflects design simplicity. There is no restriction on merging of any data/file/folder between Outlook PST files or on file size. Kernel Merge PST supports both UNICODE and ANSI Outlook PST files. Also, there is no bar on Outlook versions, and the size of files.
Follow below steps to merge/join Outlook PST files using the tool

  1. Launch Kernel Merge PST tool.
  2. Browse for the PST files you wish to merge/join.
    Browse PST file for merge
  3. Select the radio option whether you want to merge or join the PST files; click Next.
    Note: The Merge option will merge multiple files content into a single PST file with hierarchal mailbox folders while the Join option will join multiple PST files into a single PST file but as individual folders.
    radio option for PST merge
  4. Here, upon completion of scanning the PST files content preview would pop on-screen. Select the required mailbox folders and click Next.
    complete scanning process
  5. Apply filters to export selected folders from PST files or skip the step. You can apply filters by date range and by time-period to export specific PST file data as per the requirement.
    Apply filters
  6. Specify the file saving location and click Next.
    Specify the file saving location
  7. The whole process would complete in a few seconds. Process completion time would depend on the size of the PST files.
     Process completed
  8. Once merging or joining is complete, click Ok.
    PST merge successfully

Therefore merging of multiple PST files completed in few steps by this advanced PST merging tool.


The manual migration method can be tricky and confusing, as there are a couple of steps in the process which require total user attention. The is why many Outlook users use Kernel Merge PST tool. The tool is compatible with all the latest Outlook versions like Outlook 2019, 2016, 2013, 2010, and 2007. With the help of this tool users can easily merge multiple Outlook 2016 PST files.

Watch Video: To know Complete Process of Outlook Merge PST Tool


Kernel Merge PST