Do you need to import offline OST files in Office 365? Then, you can try OST to PST Converter software - a correct and well-developed application for users to accurately import offline OST files in Office 365 with complete data contacts and attachments. It can migrate your bulk items from OST file to Office 365 in a single process without missing a single piece of detail. To learn more about this tool, you can first use its trial edition which is compatible with migrating the first 25 items from OST to PST free of cost. After using its trial edition, you can go with the licensed edition of the tool to import offline OST files in Office 365.