The best way for converting OST data into office 365 format, Users to use the third-party tool. Opt OST to office 365 tool is 100% helps you to easily convert OST data but if the tool is perfect and reliable for conversion and provides the batter services. I would suggest the best and reliable tool, OST to office 365 converter. The OST to office 365 converter tool converts the multiple OST files to office 365 account in Outlook PST formats and it also recovers the deleted and inaccessible OST data items such as email, contact, task, calendar, Journal, etc. It also exports OST data into Office 365, Live Exchange Server, PST, Zimbra, Gmail, vCard, ICS, OLM, MSG, EML, EMLX, MBOX, PDF, NSF, and etc.
Add OST to Office 365
The free OST to PST Converter tool transfers OST files to Office 365, AOL, Gmail, Yahoo Mail, Thunderbird, Outlook, GoDaddy Mail, HostGator Mail, etc. But before starting the migration, you should have the username and app password of the respective email client.