MailsDaddy OST to Office 365 Migration Tool helps in keeping all details of the Outlook OST file to O365 preserved. The software supports all damaged and inaccessible OSTs to Exchange Online mailboxes. It is also capable to support the highly corrupted IMAP, Exchange Server and Hotmail OSTs to Office 365 accounts. The application works in all versions of Windows environment to import OST file to Exchange Online in their actual file format. A highly effective and well-developed utility designed to support all types of OSTs and protect OST data from all issues. Read more about the flawless OST to Office 365 Converter here: Move OST file to Office 365 with OST to Office 365 Converter
Here is a solution for you by which you can convert OST to Office 365 on Mac using OST to PST Converter for Mac Software. It first converts your OST file to Outlook PST file format and then you can directly import the PST file to Office 365 Account. This Application transfer your OST file into PST without any problem. This Tool can easily maintain email folders to restoring CC, BCC, To, From, and attachments. The file size is not an issue to get satisfactory conversion results and This Software supports all the versions of MS Outlook 2007, 2010, 2013, 2016, and 2019. It also supports all Mac OS versions. Go ahead and download the free demo versions.