Add ability to snooze messages (i.e schedule messages to come back to the top of your Inbox). Many modern clients support this and it is actually already part of Outlook for iOS. If added, this should be available to use as one of the swipe gestures.

We would like to have an option to create a rule to delay all outgoing email, like in Outlook for Windows.
Thye idea is to have a small time to cancel the sending if there is something wrong.

You can delay individual messages, but you cannot add a rule to "auto-delay" X time any email you send.

Please make it possible to use Oulook for MacOS with iCloud contacts and calendar. It should be possible by adding support for CalDAV and CardDAV.

Currently the only way to attach an email when composing is to pull up the main Outlook screen and drag the email in. It would be beneficial if a user could click on "Attach Item" and select an email.
Ideally users would also be able to attach meetings, contacts, and tasks.

Please add the ability to view mail in columns while still having the reading pane to the right. This functionality works great on the Windows side, but I can't seem to figure out why it's only available with no reading pane, or when the reading pane is below the email...

Have Outlook added to the 'share' menu (under Extensions) in System Preferences. It's time-consuming, and annoying to constantly have to drag files to Outlook — as opposed to being able to sending them via Outlook under the 'share' option. This is a must for businesses, that email a lot of attachments. Thanks.

Not sure why this very useful feature was removed from Outlook 2016...

Show "Out of Office" messages of email recipients as we compose.

Without this, I have to send the email, See the response and Contact the delegated contacts.

It seems crazy that a task on OneNote doesn't sync to outlook and/or planner - surely we can have one list of tasks across all office applications

A number of problems occur because past history is allowed to change -- this is valuable reference info that is lost when an organizer is allowed to cancel a meeting across all time, rather than just future occurrences. Likewise, when I expire a recurring meeting, it should not readjust past occurrences that have been moved off the recurrence pattern. Guiding principle should be that the individual is the owner of the calendar, and past history should not be changed without the owner's permission.

Now that we've been told that Teams is the way forward, it would be great to be able to create online 'Teams' meetings from within Outlook on a Mac, as well as, or instead of Skype for Business meetings.

Outlook already supports drag and drop for calendar events in the standard ics format. In the same way it would be very helpful to create vcard files from address book entries by drag-and-drop.
Currently vcard support by drag-and-drop exists in some way, but only works with contacts which exist locally on the computer and it seems that there is no way to transfer them from the server to the computer.

I was surprised to see that custom views has not been implemented since 2016? Old Outlook for PC allows for telephone book style address list printout. This is 267 pages for address book compared to 34 pages column style to print 1800 addresses. Let's prove that MAC programs can work just as well as PC. PLEASE!!

It would extremely useful if it was possible to switch language for spellcheck by using keyboard. Now we have to use the menu if default language is not the one you are writing at the moment - or automatic language recognition does not work (as it almost never does).

I want to be able to see the today page, so i can easily see all customers, deals and tasks instead of having to switch between mails in my inbox