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How to merge multiple archive pst files in Outlook?

For example, you change to a new computer and add your email accounts into Microsoft Outlook with a new Outlook data file, but now you want to merge the old Outlook data file (.pst file) with the new one, how to figure it out? In this article, I will show you how to merge multiple .pst files into Microsoft Outlook.

Merge two .pst files with one opening in Outlook

Merge two .pst files which are not opening in Outlook

Merge two .pst files which are opening in Outlook

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arrow blue right bubbleMerge two .pst files with only one opening in Outlook

Let’s say there are two .pst files you will merge, and one is opening in Microsoft Outlook, while the other has not been opening, you can merge them with following steps:

Step 1: Open the Import and Export Wizard dialog box with one of following methods:

  1. In Outlook 2007, click the File > Import and Export;
  2. In Outlook 2010, Click the File > Open > Import;
  3. In Outlook 2013, click the File > Open & Export > Import/Export;

Step 2: In the coming Import and Export Wizard dialog box, click to select the Import from another program or file, and then click the Next button.

Step 3: In the Import a File dialog box, click to select the Outlook Data File (.pst), and then click the Next button.

Step 4: In the Import Outlook Data File dialog box, check the option of Do not import duplicates, and then click the Browse button.

Step 5: In the coming Open Outlook Data Files dialog box, find out and select the .pst file you don’t open in Outlook, and then click the Open button.

Step 6: Click the Next button in the Import Outlook Data File dialog box.

Step 7: In the Second Import Outlook Data File dialog box, check the option of Import items into the same folder in box, and then clicking the box below and specify the .pst file that you have opened in Outlook, and click the Finish button.

Step 8: Then a Microsoft Outlook dialog box pops up to show you the importing progress. And it will be closed automatically when importing finishes.


arrow blue right bubbleMerge two .pst files which are not opening in Outlook

If the two .pst files you will merge have not been opened in Microsoft Outlook, you have to open one of them before merging.

You can open a .pst file in Outlook with following methods:

  1. In Outlook 2007, click the File > Open > Outlook Data File
  2. In Outlook 2010, click the File > Open > Open Outlook Data File
  3. In Outlook 2013, click the File > Open & Export > Open Outlook Data File

And then in the Open Outlook Data File dialog box, find out and select one of both .pst files, and click the Open button.

Now you can follow the same steps we introduced in the first situation to merge the two .pst files.


arrow blue right bubbleMerge two .pst files which are opening in Outlook

If both of .pst files you will merge have been opened in Microsoft Outlook already, you have to close one of the .pst files before merging.

Right click the .pst file you will close in the Navigation Pane, and then select the Close “Pst File Name” from the right-clicking menu. See screen shot below.

Note: the “Pst File Name” will show as your pst file name.

Then you can follow the same steps we introduced in the first situation to merge the two .pst files.


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  • To post as a guest, your comment is unpublished.
    Kyle Minor · 1 years ago
    The manual tricks to merge PST files are a very complicated task. So you may go for some easy technique like third party https://softcart.wordpress.com/merge-outlook-pst/tool. You just have to pay few bucks and in return, you will get 100% result and that too in the few seconds.
  • To post as a guest, your comment is unpublished.
    Dan · 1 years ago
    Wow, these comments don't look like advertising bots at all...
  • To post as a guest, your comment is unpublished.
    Sandra · 2 years ago
    Hi,
    The above shared information is very useful and informative. Few days ago, I was also searching for a solution with which I could merge my Archive PST file. Through Google search, I have come across SysTools PST Merge software. This tool can merge PST files with three different options: Merge PST, Join PST & Merge Contacts. The free demo version of the tool is also available. I found this tool very efficient and reliable as it is capable of merging a large number of PST files easily.
  • To post as a guest, your comment is unpublished.
    JamesAlison · 2 years ago
    Last week, I did merging process through the assistance of Stellar Merge PST. It also has multiple saving options like new and existing PST, Office 365, Exchange Server and Outlook Profile.
  • To post as a guest, your comment is unpublished.
    Valentin17 · 3 years ago
    Thank you very much for your informative and useful article. I found a lot of information about exporting and opening pst files on outlook. By the way there is that the files have been deleted or just lost. So here is a great way to restore files PST. I recently encountered such a problem and helped me very useful article , if you're interested , here's a link: https://hetmanrecovery.com/recovery_news/restoring-pst-file-with-outlook-tools.htm
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    Joe D · 3 years ago
    Very helpful! Thanks!!
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    maredskty · 4 years ago
    or open both in outlook and select all items in say one folder and move to another