How to Merge Several PST Files into One

PST files are very well-known by all the Microsoft Professionals. Still if you have any doubt regarding PST files, let me clear it.

What is a PST file?

Email client Microsoft Outlook is used widely across the globe, and different users configure and use it to access different email services. The email data in MS Outlook is stored in a single PST file. In one word, PST file is the database of MS Outlook.

Also Read – Convert DBX to PST Manually

You can Manually Merge Several PST Files into One file

There are many tricks and methods mentioned over internet to combine PST files but I always suggest my readers to reach their goal using a manual technique. Also, if you have few PST files, manual merging is the best option rather than opting an automated tool. Many times, it is seen that users have protect their PST files with passwords. If you forget the password, you can unlock password protected PST file by following simple steps. It is often seen that people try unusual tricks to do manage PST file and their PST file gets corrupted, in that scenario you can read the complete steps to repair Outlook PST file.

Steps to Merge Multiple PST files Manually

Open your PST file(s) in MS Outlook. All the Outlook versions allow to open additional PST file(s).

  1. In Outlook 2007, Go to File ⇒ Open ⇒ Outlook Data File
  2. Locate the PST file you want to open in MS Outlook and select it
  3. Repeat Step 1 and Step 2 for multiple files


Why Do we need to Combine Multiple PST Files into One?

This requirement is not often raised by normal or home users, but when MS Outlook is used in large organizations where email is the basic source of any communication, the requirement pops up rapidly. This is because:

  1. The size of PST file is limited (i.e. 2 GB for ANSI and  20 GB for Unicode)
  2. Single user accesses multiple emails on different computers
  3. Employee resigns and you have to handle its previous emails

Also Read – How to Split PST file into multiple PST files

These are the basic three reasons why we need to combine multiple PST files into one single PST. As of-course, it gives an ease to access all the emails in a single interface.

Combine or Merge Multiple PST Files


Recommended – All in one Outlook Solution

In order to view the PST file imported in Outlook, changing the navigation pane to a folder or Mail view is what i recommend. The Folder List button can be at the bottom left of MS Outlook. You can easily move your email list to another folder by simple drag and drop or by move option, which you get when you Right Click on the selected content. All you email files or content will be transferred to the destination you chose.

Also Read – How to Compress Outlook PST

P.S:- Sometimes the process hangs up if the PST size is large. Consider applying the above steps partially(Move emails in parts).

Steps to combine PST files using third-party tool

If you want to merge several PST Files into One, I suggest you to go for a third-party tool. There are many third-party PST merge tools available in the market and may perform a Google search for that. I would personally recommend an inexpensive tool I used for my organization. You may consider using PST Merge Tool by SysInfoTools. I would recommend you to try a demo version of this tool before you purchase it.

I hope your doubts are clear on how to merge or combine multiple PST files manually and using an automated tool.

Question and Comment

Merge PST Tool Free Demo

About: phillcalls

12 thoughts on “How to Merge Several PST Files into One”

  1. I was looking to merge multiple PST files at my work place. Tried using the manual process you mentioned in this post, it worked but quite slow, I would prefer going with the automated technique you mentioned. I tried the demo of the tool you recommended here, it worked perfectly, but because it is a paid one I have submitted a request to my boss for the purchase.

    Just for correction, you have written “Steps to combine PST files using third party tool” but no step is specified, consider making the appropriate correction. Thank you for sharing such a wonderful article. It really helped me. Hope to get some more on managing PST files here.

    1. Well thanks Mark for taking time to drop your experience, i am glad that the process i specified in the article helped you with your work. As you say that the manual process is slow, well that’s the reason why there are automated tools in the market so that. Thank you for pointing the error in the article, i’ll surely change it right away. I am happy that you came up with a suggestion and it really makes a difference. I hope you merge your PST files perfectly. Hope you land back on this blog again.

      1. Thank you so much for your quick reply “phillcollins”. Currently I got my work done using Manual Technique. Thanks again

  2. You are a wonderful writer; the steps provided here are easily understandable and resolve the issue easily. Well I have 3 Outlook Accounts configured on different computers and two of them are just used to check old emails. I am stunned that I never ever thought of merging my emails into a single computer. I think it’s time to merge them all and start managing my emails easily on a single computer, I just need to ask you, should I do this manually or automated tool you specified is the best option? Money is not an issue with me; I just need a perfect option for my work. Thanks for sharing this article on my profile.

    I hope you’ll reply soon so that I can combine my Outlook PST files soon…

    1. Michael, I am glad that you liked the article. Well yes it’s the perfect time to combine your multiple Outlook PST files into a single PST. Though you can get it done manually as mentioned in the post, but if you can bear paying for the tool to merge PST files, I would nod and abide with your decision of buying the automated tool. With it you can save your time and no need to worry about duplicates. The tool will give you many other options before processing. But remember, you must check the tool capability using the demo version. I hope this will help. Enjoy! and hope to see you back here.

      1. Happy Me! thanks a ton, the tool worked like a miracle for me. Though manual technique works as well but i saved a lot of time. Keep posting such articles.

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