This issue only affects one user and I have no idea what is causing it.
When this user gets an email and uses the "reply with meeting" button, it loads the appointment creation window and shows the default meeting length of 30 minutes.
The user sends the appointment, but does not see it in the calendar. All other meeting attendees can interact with the meeting normally and see it in their calendars. The only way I have found for the user to interact with the meeting is waiting for the meeting reminder to pop up.
When the user opens the appointment from the reminder, I can see that the length is 0 minutes (e.g. 10:30am-10:30am). So while the calendar does technically register the appointment, it gives it a 0 minute length. All other attendees see the 30 minute length.
Any ideas on what could be causing this? I have tested it on multiple...