Install and run PST to MBOX Converter on your system.
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Go to the Browse button and add PST files to whom you would like to export.
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Complete scanning and preview of PST files. Users can select items to export.
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Now, choose MBOX format where you want to export the PST file.
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Use the Browse button and set a location of your system to save the resultant MBOX file.
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Finally, hit the Convert Now button to commence the conversion.
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