How Can I Merge PST Files without Outlook?

Hey David, I had the same problem last week and used a third party tool to fix this problem. The tool allows me to merge PST files without Outlook.

Unluckily, there is no manual method here to accomplish this task. But you can merge multiple PST files without Outlook using some third-party tools like SysTools PST Merge tool. This will allow you to merge data files in a new PST without installing Outlook application.
You can download the tool from here- https://www.systoolsgroup.com/pst-merge.html

You can follow these steps to merge PST files without Outlook using the PST merger tool:
Step 1. Download and install PST file merge tool.
Step 2. Add PST files or folder to merge.
Step 3. Select Merge option and click Next.
Step 4. Choose merge in New PST file option.
Step 5. Select items which you want to merge.
Step 6. Click on the Next button to start the merging process.

Hi Dexter, Yes, the tool supports merging ANSI and UNICODE PST files into a single UNICODE PST file. In addition, it supports merging archive PST files with no 2GB file size limitation.