When composing a mail in a new window (and not in the reading pane) the AddIn toolbar is not displayed. It could be very useful to have it.

Enable reply and forward buttons for emails sent as attachments. At the moment if someone forward's me an attachment as a .eml file I can only preview it. The Reply and Forward buttons are disabled. The feature is available on Windows and the browser.

Please provide full support for iCloud accounts, as provided for IMAP/Exchange accounts. Thanks.

Ooops - did we lose the 'Resend' option for sent messages?

In current Outlook, my contacts are in the My Computer folder. New outlook does not display them.

How can you design a "New" Outlook that doesn't have same functionality of the Old Outlook.

And when the Old Outlook is no longer an option, how do I get my contacts?

Bad design.

When sending an incorrect email add the ability to recall that email from all recipients as is possible with Office for Windows client.

The new idea of loading Notes in a web browser rather than the Outlook app is TERRIBLE. It also means that if I don't have a web connection I can't access the Notes. Please bring back Notes to the Outlook app.

Outlook for Mac gives ability to custom categorize calendar items by color. This helps me quickly scan my day/week view. However, this function can only be accessed after the event has been created by right-clicking the calendar item and scrolling down to "Categorize". Please review and add! Thank you!!

When the Agenda/ My Day tab is open, replying to an email somehow forces the window to expand past the edge of the screen and there doesn't seem to be a way to adjust this in the settings.

In Outlook, could you pls bring back Connection Status either in status bar or another property in Customize toolbar whether this connection is Online/ Offline. It is hard to see in first sight if there is any network challenge.

The checkmark is important. It gives me some small joy and semblance of accomplishment. Without the checkmark my inbox is just a continuously growing list of questions, tasks and requests that will never appear to be completed. It will just continue to grow and grow and grow. It's the thing of nightmares and panic attacks. Please, let me have my little checkmark.

I would like the ability to create custom Category colors (this used to be an option) instead of being confined to the set 20. I would also like the ability for these custom colors to sync to my account and across all of my devices. I rely on color-coding categories to be able to tell at a glance what topic my calendar meetings are for and I either run out of colors or would prefer a custom one. Thanks!

feature to "show all messages from this conversation" is not there anymore

Enable vertical scrolling to navigate through the Calendar through weeks, months and years instead of having to click the left and right arrow at the top of the screen to incrementally move one month at a time.

Right now you cannot add, remove or rearrange columns in People section, and they are automatically pre-grouped in Name (instead of First/Last Name) and Title and Company (instead of 2 separate Columns).
I also cannot sort/search by Category, Title or any other field in the Contact.

Junk Mail/Block Sender

Using a MAC:

The function that allows to block senders is no longer available. I've also been receiving an abundant amount of SPAM lately since switching over to the "new look".

The Windows version has Quick Steps, which I rely on to quickly process my emails. It would be great to have them in Outlook for Mac.

Add support for importing and exporting PST files to the new Outlook for Mac so that it's easy to move data to/from PCs.

port the address book from the windows outlook client to the macOS version.
In a large company you need to be able to select different address lists and GAL from the exchange server

There doesn't appear to be any access to the Online Archive area using the new Mail client. This will be a problem for me and my users that make use of this storage area.