Import OST to office 365 account-Quickly import an OST file to your Office 365 account by Outlook OST to office 365 Migration Tool. The Outlook OST to office 365 Converter software has been many key features. First convert the OST to a PST format using a reliable third-party tool. Once converted, open Outlook and go to "File" > "Open & Export" > "Import/Export." Choose "Import from another program or file," select the PST file, and follow the prompts to complete the import process.
