At event/appointment creation, one should be able to choose a color for it, independent from the current calendar color. All of these events and their colors would appear in the calendar and in all views.

Your native calendar widget is ugly. Either provide more choices or allow us to sync with Google calendar seamlessly instead of having to export entries and manually sending it to Google calendar.

I use multiple calendars in Office 365, each color coded to use, (personal, business, holidays, etc.) When on my desktop with the calendars overlapped I can tell what the appointment is by it's color.

I would like to see those same colors sync with the Outlook app on my Android phone.

When I use Windows Outlook Calendar I can assign Color Categories.
But in Android I can only see the colour with te Tag Category but not assign a category to a new event created from my phone.

calendar widget should show events from imported calendars (like Facebook event calendar)

when I'm using the Android app I cannot simply copy a single event to another day. sometimes it happens that I want to copy a particular event and move this copy to another day for example I have a second meeting concerning the same matter. that would be very helpful if you could put these kind of possibility into the calendar app.

Attach/link contacts/people from within Outlook contacts to calendar event/appointment without having to invite or send email to anyone. I would like to be able to link a contact file to an appointment without actually having to invite anyone to that appointment.

the "up next" feature may be handy for some, but it should be optional. i have other ways of seeing the same data, and having it at the top of the message list is just taking up space.

Search in calendar for same events past and future.

being able to see "other calendars" or shared calendars in outlook on Android for exchange accounts is a needed feature. the mobile owa has this feature, I'd like to use the app completely.

Make Calendar events show up on Android auto, this allows us to join meeting remotely when driving. Also manager schedule on weekday, as my work uses Outlook 365.

Phone numbers that include silences (designated by a comma) followed by typing an extension (for example, for conference lines that require codes) are no longer recognised - only the part before the silence is recognised.

This used to work fine, but no longer works in version 4.1.38.

In Outlook (on desktop) and several other calendar apps it is possible to color code appointments. In the Outlook app, unfortunately these colors are not shown. This is quite annoying as I color-code many of my appointments to distinguish between different types. (e.g. private vs work or returning meetings vs priority meetings)

Change the text in calendar month view to black instead of white so it is easier to read

Can we please add a custom calendar reminder for events. We have on the day 9am, day before 9am and 1 week before... I would like to have custom field so I can set a custom reminder ie set a reminder for an event 3 weeks and 2 days in advance of the event. Most Sumsung and iPhone calendars allow this already.

enable swipe options for Outlook calendar, like with the mail

Previous Outlook web version you could just click an icon and send options for meeting. Receiver could just click one option.