Reply To: Unable to import .ost file to Office 365 Michael Scofield ~ Modified: February 21st, 2017 ~ ~ 1 Minute Reading Home › Forums › Unable to import .ost file to Office 365 › Reply To: Unable to import .ost file to Office 365 June 7, 2016 at 5:46 am #2211 Score: 0 Michael ScofieldModerator Karma: 20 pts Hi, Could you please provide the steps to show how to upload OST to Office 365? Thanks in advance Michael Search