We are trying to migrate all of the .msg files that were archived outside of Exchange on prem to outlook.office365 for the upload portion I have been using the Microsoft.Exchange.WebServices and passing the mapimessage saving as an email message and uploading to which folder matches the MessageClass We haven’t had a problem with the IPM.Note going to the Inbox, however when an IPM,Appointment is uploaded to the Calendar it does not show on the calendar. from all of the samples I find on the A......to Exchange in the cloud Aspose.Email Cloud Product Family dewebb...the API at your end i.e. Aspose.Email for .NET 17.6. dewebb June...