Users can go for a trustworthy solution MailsDaddy OST to Office 365 Migration Tool that can effortlessly import OST file database into Office 365.
Most professionals also suggested using this popular solution to quickly shift OST file databases into Exchange Online account without losing a single bit of information.
It provides a bulk migration feature by using that users can upload single or multiple OST files into one or more O365 accounts at a single time.
To know more or download the free trial, visit here: Import OST to Office 365