You can’t open an OST file manually, but you can use the Advik OST Converter Tool to and convert it to other file formats. Even though you can’t directly access an Outlook OST file, you can still save its contents as a PST file. This lets you back up your emails so you can open them later.
If you looking for solution to open OST file in Microsoft Outlook then you can try SysTools OST to PST Converter which is one of most reliable and user-friendly tool thats why is used by the most of professionals. It’s advance feature like it can export OST into different file format like MBOX, MSG, EML, and many more. Handle multiple OST file can convert into PST format at once help user in many ways.
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If you want to open OST file in Outlook then you need to transfer it into Outlook compatible PST format by using Corbett OST to PST Converter and easily import into Outlook as well as it can also restore and convert damaged, corrupted, inaccessible and overlarge size OST file.