Migrating Exchange to O365 can be easy if you choose the right process such as choosing professional tools over manual process. Manual processes are always time consuming and the file may stuck in between but with the professional tool you can easily migrate Exchange to O365. MailsDaddy Exchange to Office 365 Migration tool is the best software. There is no size limitations users can convert any file with having large size or small size. There is option of mail filter which can separates the duplicates files. To know more visit : Exchange to O365 Migration