Migrate OST to Office 365

Here you can use KDETools OST to Office 365 converter tool is the well & unique method or any third party solution to convert bulky OST files to Office 365 mailbox without any hassle and also split large size of OST files in Office 365 accounts. You can quickly try the best third-party tool such as KDETools Import OST to Office 365 Tool, which I used a few days ago, it provided me a fast and secure way to convert OST file to Office 365 accounts. By using this tool, you can convert OST to Office 365, Zimbra, Gmail, EML, EMLX, vCard, ICS, MSG, PST, Live Exchange server, MBOX, and, etc. The software is compatible with Windows OS and supports all versions of MS Outlook, including Outlook 2019. more info-
Migrate OST to Office 365

Shoviv OST to Office 365 (Outlook Suite) tool provides a simple and safe solution to import accessible and inaccessible OST files into Office 365, Live Exchange, Outlook Stores, new PST, EML, and MSG. It also lets Outlook users import PST files, split PST file, merge multiple PST files, compress PST file size, and remove duplicates from PST files. A free trial version is also available on the web.