Please get rid of the pop ups notifications and switch to the native macOS style notifications.

There is no easy way to toggle the Sidebar, when extended/open, you need to go to the view menu but once collapsed/closed. there's a nice icon to extend it again.
This icon should always be visible to the user.

It would be nice to be able to extend the possibility to activate the "new Outlook" also to account which are not Office 365, Outlook.com, or Google account - as for example the Exchange Onprem. is there a timeline?

Literally can't even use the new Outlook now since we rely on this

I would love to be able to arrange my email accounts, like have them in the order I want instead of the automatic ordering from AtoZ.

My auto archive scrip are failing or doing nothing when in new outlook mode.

The ability to customise or use other keyboard shortcut schemes (e.g. Gmail) on the web app makes it 2x faster to process email. Please bring it to the desktop app!

I thought Addins (https://outlook.uservoice.com/forums/924856-the-new-outlook-for-mac/suggestions/38972491-support-for-o365-add-ins) were going to do this, but I don't see an option in the customize toolbar for OneNote integration. I would like to be able to send both emails and meeting notes from outlook to Onenote like I can in both the iOS and the Outlook for Mac products!

Allow contextual default search context customization. From the inbox, I would like to search the entire mailbox. From other folders, I would like to search the current folder. This feature is available in Outlook for Windows.

It used to take up a small part of the right-hand side of the display, however now whenever it opens it takes up half of my display, shrinking the tab in the middle for reading emails. I never felt the need to move it around before, but now i have to drag it around to a usable size every time i open outlook. I have a screenshot if the devs want to see what I mean.

On MacOS you've standardised keystrokes when moving the cursor or editing text. It's very inefficient and distracting, that Outlook is not following this standard.

One example:
System wide you can use Ctrl-a to jump to the beginning of a line
In Outlook it selects all text. -> Very problematic for people who can write fast.

Put time limits on outlook iOS app notifications.

I want/need notifications during the day but not at all hours of day or night

When replying all to an email or changing the meeting participants I simply want to select and delete people I want to reduce the thread or meeting to. Sometimes this works. Other times it just deletes the last one at the end...and undo doesn't get them back. Please make this reliable - that highlighting and clicking the one to delete isn't an unpredictable behavior decided by Outlook.

Font sizing and UI sizing is all over the place. Somone needs to spend some time on getting the look proportionally correct. Right sidebar is huge compared to the other UI elements.

New message, meeting should be in toolbar like in web client (these things should really be consistent).. it's much better to put all operation in the toolbar instead of randomly splitting this one off and segregating it by itself in the blue area... took me 5-10mins to find it 🙁

Have the ability to customize contact thumbnail colours along with adding contact pictures so they show up in the inbox

imap for gmail or categories enabled for gmail

Improve usability by adding a dropdown arrow to the right of all of the icons that are dropdown menus. Currently I have to click on the icon and hope it's a dropdown menu.