What is missing today for me are: -in the received invitation menu, we can accept, refuse,...but no option without sending an email to the person who created the invitation. -no option to see all the received invitations in the calendar home page. We see only accepted invitations. If we don't accept immediately the invitations received by emails, we will not see them in the calendar, and that case appears each time i am in business trip, i just look at first the OneCalendar app synchronised with Office365 and missed sometime some meetings.