Merge PST Files without Duplicate: Ultimate Guide

Anshu_123

Anshu_123

Member
To merge PST files in Outlook without duplicates, you can use either manual methods or specialized software. Here’s a detailed overview of both approaches:

Manual Method Using Outlook​

Step 1: Create a New PST File​

  1. Open Microsoft Outlook.
  2. Go to File > New Items > More Items > Outlook Data File.
  3. Choose a location to save the new PST file, provide a name, and click OK.

Step 2: Import Old PST Data​

  1. Navigate to File > Open & Export > Import/Export.
  2. Select Import from another program or file and click Next.
  3. Choose Outlook Data File (.pst) and click Next.
  4. Browse to select the old PST file you want to merge.
  5. In the import options, select Do not import duplicates and ensure that the option to include subfolders is checked.
  6. Click Finish to complete the import.
Repeat this process for each PST file you want to merge into the newly created PST file while ensuring you select the option to avoid duplicates each time.

Automated Method Using PST Merge Tools​

For a more efficient and user-friendly experience, consider using specialized software designed for merging PST files while eliminating duplicates. Here are some popular tools:
  • Download and install the Cigati PST Merge Tool.
  • Click on the Add PST Files button to select multiple PST files.
  • Choose the merge options and specify a location for the new merged PST file.
  • Check options like Remove Duplicate & Exclude Deleted Items, then click Next to start the merging process.

Conclusion​

While manual methods are available, they can be tedious, especially when dealing with multiple files. Automated tools not only streamline the process but also significantly reduce the risk of duplicates, making them a recommended choice for efficiently merging Outlook PST files without losing data integrity.
 
If you want to merge PST files without duplicates then you must try the DataVare Outlook PST Merge Tool as the best solution. This application has a simple graphical user interface that makes it a simple and easy-to-use solution for technical and non-technical users to merge multiple Outlook PST files without duplicate data. This application will support all versions of MS Outlook to merge PST files. Users can operate its feature with basic technical understanding. Users can install this software on the Windows operating system.
 
Merging multiple PST files without duplicates is simple when you use the MailsDaddy PST Merger Tool to merge PST file data efficiently. This tool combines several PST files while preventing duplicate emails, contacts, and calendar entries. It supports both ANSI and Unicode PST formats, preserves folder structure, and works without requiring Outlook installation. With features like password-protected PST support and options to merge or join files, it’s the perfect solution for hassle-free, accurate PST consolidation.
Read more: PST Merge & Join Tool to Combine Multiple Outlook PST Files
 
I would advise utilizing an expert tool instead of doing it by hand if you want to combine several PST files into one without duplication. Although the manual method (Import/Export in Outlook) is effective, it is laborious and frequently fails to handle duplicates effectively.

I have personally tried the GainTools Merge PST Tool and it worked great for me. Features are
  • An infinite number of PST files are combined into one file.
  • If you have archived the same emails more than once, the option to eliminate duplicates when merging is quite helpful.
  • keeps data intact while maintaining folder hierarchy (Inbox, Sent, Drafts etc.).
  • supports Windows OS and all versions of Outlook.
  • You can combine all of your contacts, calendars, emails, journals and more in one place.
Additionally, it is simple: simply add your PST files, select whether to join or merge them, turn on the delete duplicates option and then let the tool do its thing.
If you do not want to spend hours manually eliminating duplicates, this is a lot quicker and safer method. Before purchasing, you can test out the GainTools trial edition to see how it manages your data.
 
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