How to Merge PST files without Duplicates?

If you want to manage multiple PST files and avoid data loss problems, you need to merge all PST files into one. You can manually accomplish this task if you have strong technical knowledge and have limited PST files. If you have large number of data files, manually it is very time-consuning and difficult. 

We also have a automated tool for all Outlook users that allows you to merge PST files without duplicates. The SysTools PST Merge tool will help you to merge multiple Outlook PST files into one and remove duplicates. It provides option to join or merge data in New PST, Existing PST or Outlook Profile. 

Features of the tool:

  • Supports to join two PST files by creating a new folder
  • Merge similar folders into a singlee folder
  • Suppprts all Outlook versions including latest Outlook 2019
  • Combines ANSI and UNICODE PST into a single UNICODE PST
  • Able to combine password-prorected PST without entering password
  • Supports to merge two archives PST files into a single one



2 Replies
marcus thomas

Combine large Outlook files into main well-regulated parts is the best option to lessen the error from the PST file. There are many techniques available over the market to merge the Outlook file, but here I suggest you try GainTools Merge PST Software for Windows which secure combine the various PST file. This method is easy doesn't require any technical acquaintance.

jesse walter

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

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

Open Outlook, and click on File tab.
Click on Open & Export > Import/Export.
Select Import from another program or file; click Next.
Select Outlook Data file (.pst) and click Next.
Browse the PST data file to import and click Next.
Select the folder(s) you wish to import to the new PST data file.
Click Finish.