To import OST files into Office 365 or other email clients, you can use the SysInfo OST to PST Converter. First, install the software on your computer. Once installed, launch the tool and upload the OST files you want to convert. The software allows you to export your OST data into various formats such as PST or directly into email platforms like Office 365, Gmail, or Thunderbird. After selecting your preferred destination, simply click Convert to transfer your OST emails, contacts, and calendar data. The tool also offers a preview feature and allows you to apply filters, like date ranges, to customize the conversion process. It’s an easy and reliable way to migrate your OST data with no risk of data loss.
To import OST files into Office 365, try Shoviv OST to Office 365 Migration tool.
Visit here: OST to Office 365 Tool to Import OST File in Exchange Online