To get the best solution to upload OST data to Office 365 Cloud environment, try MailsDaddy OST to Office 365 Migration Tool. It is a brilliant software to recover or retrieve even the highly corrupted OST file. It also supports and allows giving the preview of the orphaned Outlook OST files. The software works well with IMAP, Exchange Server and, Hotmail OST files and migrate entire OST data including contacts, journals, tasks, emails, attachments, etc. to Exchange Online Cloud Platform. It consists of various search options allowing to find OST file even if you are not aware of the location the OST file. The tool offers bulk OST file migration with the help of CSV file. Provides easy process to map the OST files. You can even organize OST data creating a new folder in Office 365 Primary or In-Place Archive mailboxes and exporting entire data to that particular folder. The tool offers a clear working process to migrate OST to Office 365 Platform providing the clear and written export options. It embedded with extra feature to transfer Outlook OST file to PST. If you want to experience this tool, you can download its free Demo version and use its significant features. You can also purchase this software at a reasonable price of $99.