need to be able to open another mailbox from the new OWA like you can in the old OWA

No plug-in for adding skype meeting info. Can't use this feature without being able to add these details.

There used to be an option to open others' calendars and I cannot find it now. In the old OWA it's: right click on Other calendars/Open calendar/From directory

put all of the emojis in the outlook

What happened to undo send??

When emailing and you accidentally put someones name in the "To" line but need to move them to the "Cc" line. You use to be able to just drag them back and forth. Now you have to delete and then re-add them in the appropriate place.

In the new interface it's missing the email calendar event reminder email, there is only the pop-up alarm.
Please, recoverit, thanks!

Loading my mail under the new system was taking at least four times longer. Loading a simple text email shouldn't (and doesn't under the old system) lag and take more then just a click to open.

Within the old version of Outlook 365 you could open an email and click on the menu on the right side of the email and select from the dropdown the Reply All by Meeting. Great feature. For when you need to schedule a meeting about the email that has been sent. Now I have to go back to the old version to do this.

In the new version I can't drag the attachments between a windowed mail to antoher new messages.
Now I need to save the attachment and then to reattach to the new message.

Mail interface is just a mess. Cluttered, confusing, difficult to use. Please, please, please clean up the interface. Smaller fonts. Less cruft. Something like old desktop Outlook, Thunderbird, or Zimbra.

The old interface was an abomination. The new one is no better.

Can we get delayed delivery in the browser based client please?

I can't drag emails into the left hand folder pane, like was possible with the old interface. Would be such a time saver if this works in the new interface as well. Using Edge 42.17134.1.0

Need to be able to access Distribution Groups (not Office 365 Groups) from OWA like in old version so users can self-service join/leave.

https://support.office.com/en-us/article/distribution-groups-e8ba58a8-fab2-4aaf-8aa1-2a304052d2de

Please show the Notes folder in the New Outlook

The new colored outlines on white flags make categorizing nearly useless because it's so hard to see the flags. I prefer the old, solid colored flags.

I didn´t like the new colors and show the attachment is not helpfull, just use more space of my view.