Work Week view let's the user choose the starting day of the view - how ever this is static. It would be ideal if one could set "Today" as the start of the week and look at future events only - rather than past / expired events.

This is more in line with how google calendar works.

When creating a meeting to send the invitation, I would like to set two different time for a single meeting such as the time for the room reserved from, and the meeting start time.

It would be great if meeting organizers could change attendees’ reply when needed. Because we would like to know attendances for the meeting before the meeting starts if someone took a day off. Also, we want to keep the organizers access permission as the Reviewer.

I would like to customize the calendar item creation window to show more fields other than location, phone number, and capacity.

I wish Outlook calendar wouldn't change the icons. I'm quite happy with just the bullet point and don't want the calendar to keep changing the icons whenever I edit the calendar entry. Frankly, it's really annoying.

Ability to send calendar invitations from “personalized domain” email linked to Outlook account. It’s unusual that I can send and receive emails and even login from a personalized domain but I can’t select that domain to send my calendar invites. Super confusing for people who get emails from one email and calendar invites from another. This is a pretty basic feature and it’s unbelievable it’s not in the offering.

Sometimes when I load my calendar view, it switches to having only the default calendar checked. I have four other calendars linked/imported, and it's annoying to have to check them again every time.

It would be great if you could implement a feature that over 24hr calendar item can be shown in the regular time line when you book it.
When you create a calendar item which is booked for over 24 hours in OWA/Outlook, the item will be shown in the top of the time line in the calendar view, and it is hard to recognize whether or not there is an event at a glance.

Allow for custom colors of categories and calendars by allowing users to create colors based on HEX Codes (google calendar does this already so I'd love for you to blast them out of the competition)

When we get a single meeting's reminder pop-up and after we "Join Online" by clicking the button, the reminder should go away.

Mobile APIs of Outlook.com accounts not exposed for third party calendar apps. This prevents those apps from retaining the invitation mails after acceptance of invites from inside the calendar apps.
This is not desirable.
Retention of invitation mails is required as evidence for future.
Microsoft must expose mobile APIs for outlook/ exchange accounts to be used by third party calendar apps to enable them retain the invitation mails after acceptance of invites inside the calendar apps..

When I create a new event, I want to make it so that those who I invite can edit the event. I want my co-workers to be able to change a conference room, add an agenda or change the time without having to come to me to make the changes. Google provides this option, why can't Outlook. I trust my co-workers to make changes to a meeting event that they are participating in.

I love the new calendar and to do side panel, can you make it sticky or give me the option to pin it so that it is displayed when I log into Outlook on the web?

For a meeting scheduled by someone else, when I decline the meeting, all the previous meetings (that I actually attended) are deleted. I want to be able to keep these on the calendar. When there are only a few future meetings, declining each one is fine, but some people don't put an end date on it. Deleting the past ruins my schedule for being able to go and look at history.

Please add a new calendar for Poland with Trade Sundays

Add "show all calendars" option so we don't have to select each time we open "Calendar View"

Your calendar, in theory improved, does not send remind email. This is very unfortunate. It was working perfectly well, and suddenly I missed few things (to call doctor for my chirurgical intervention set up date for example) because I blindly believe for that reminder. Will make adjustments quickly?

DID YOU AUTOMATICALLY CHANGE THE CALENDAR TO A NEW VERSION? HOW DO I CHANGE BACK TO THE ORIGINAL? HELP!!