Outlook 365 is a cloud based application that works on when the network is connected and It totally protects the metadata and other details. If users are unable to know how to repair an OST File in Outlook 365? Then I got a tool from Google SysInspire OST to PST Converter Software. OST is a desktop application used on local machines. It migrates the OST file into PST, EML ,Outlook 365, HTML, and other formats. Non Technical users can also use this software without any issues. There is 24/7 hrs technical support available for all user.