Scheduling and managing events using Outlook.com calendar
I started having the same problem of Appointments getting converted into Meetings after they are edited using Apple's Calendar App on my iPhone. I got worse result when I attempting using Outlook for iPhone - all Appointments look as if they are Meetings when viewed from Outlook for iPhone. The problem started this week after update of Office 365 Home and update of iOS to Version 11.3.1. Seems that Outlook Team needs to fix Outlook to restore Appointment functionality for both Apple's Calendar App and Outlook for iPhone.