How to fix the error Outlook OST file in use and cannot get accessed?

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I want to mansion here a trusted name MailsDaddy that is much famous in email migration field.
Take the help of OST to PST Converter Tool that effortlessly convert convert single or multiple OST files into PST format. Here users can also convert offline OST files into PST, EML, MSG, MBOX, RTF, Office 365, Live Exchange Server, and others.