You can take an third-party tool called SysInspire NSF to PST free software to convert NSF to PST file with having all emails, contacts, calendars. attachments, images. This software allows you to move single and multiple email items of NSF into PST, EML, MSG, HTML, MBOX, EMLX, and ICS format. You can have a free demo version of this tool from the SysInspire official website.
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