make calendar show all appointments
exchange appointments disappear and then reappear on refresh
You have received a mail and want to create an calendar appointment, based on the subject and content within this mail.
Also perhaps it could be an meeting invitation to selected participants.
I use this almost every day in Outlook and is a great help as the reminder has the original mail attached.
Linnenbrink, Chad commented
Like the desktop Outlook app, have some visual indication to differentiate appointments by response types: tentative, busy, free
Stefan Schulz commented
When I read an appointment I want to look up in the calendar if other appointments exist. After that I can accept or decline the appointment.