Provide an ability to customize the ribbon, like moving features around. I wanted to move the SEND button farther to the right but can't.

Reorganize your ribbon so that functions are grouped together, OR better yet, allow users to customize their ribbons and quick access toolbars for their own needs as users on a Windows platform can!

Allow ability to see Calendar (or tasks, etc.) on right sidebar while working in mail. This was previously very helpful in past Windows versions

The colorful (blue) one is ugly.

I love the idea of the dark mode option, however on most cases I find it hard to read with a dark background due to recent updates. I hopes there's a permanent option to switch to light mode for reading pane, instead of having to push the light switch all the time when scrolling through emails.
Now I gotta turn off the whole dark mode option for reading and efficiency purposes.

Be able to see and insert file types like JPEG, PNG, PDF and other non Microsoft document files located in cloud in either OneDrive or Sharepoint to be able to add it in the “Insert Link” feature when creating or responding to messages.

The coloured square that is relative to the category needs to revery to highlighting the whole email - as per calendar events in weekly view.

Hello,

I commute between the Slovak Republic and the Czech Republic almost every week. Every time I do so, Outlook shows me an alert:

"The time zone setting for your computer has changed. Would you like to update the time zone setting in Outlook?"

The Slovak Republic and the Czech Republic are in the same Time Zone.

I use fast insider on macOS. My colleague commutes every day and he gets the same alert on the stable track on macOS. This issue has been happening to us at least for half a year already.

I want to be able to customize my quick action icons that appear when I hover over my messages. It's so easy to accidentally delete or archive a message when trying to mark it as important.

Please provide the feature to import / export data in common formats.

What about adding the link to the release notes directly in autoupdate. would save me a lot of time...

Non-English language text input method needs shortcut key to transform the characters like Kanji, Chinese character, etc.
But Outlook and some Office application force to assign each application's shortcut and they disable text input method shortcut.
This is really headache.
Please give us shortcut key assignment settings in all office applications or leave the priority to text input method shortcut.

I would like the ability to hide OneNote from the ribbon bar in favour of being able to replace with Teams or other MS shortcuts..

Need the ability to use unsecured port numbers (like 25 or 110, etc.) with SSL connection due to the settings implemented by the IT Admins or requirements setup at the Server level. Other email clients allow this feature and having this enabled will help a lot of users.

In the "Old" Outlook preferences -> Accounts, there's an "Advanced..." option to be able to go in and make some changes to the account. This is no longer available in the "New" Outlook. It should still be available.

Clean design - get inspiration from Airmail, Spark, Newton, Mac Mail.

Please make everything customizable - toolbar, font size, color scheme,