I will suggest you try the manual method first before going for the automated solution. Follow the below process:
Open Outlook, click on Files >>Open & Export >> Import/Export.
2. Choose the option Export to a file. Then click on Next.
3. At present window choose Outlook Data File (.pst) and click on Next.
4. Choose the folder which is required for conversion and hit on Next.
5. Now, browse the desired path to save the PST file and select the options regarding the duplicate items.
6. Click on Finish.
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