How to fix OST in use and cannot be accessed?

If you want to fix OST in use and cannot be accessed, so here I suggest you get SysInspire OST to PST converter software. This tool can convert OST files into multiple file formats such as OST to PST, EML, EMLX, Office, Yahoo Mail, Gmail, vCard, etc. It has a demo version that can convert items from each folder. It has+ a file format for conversion users can convert OST files into these formats. It has bulk conversion users can convert OST files in bulk at the same time. It supports all versions of Windows OS.

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