In the old outlook pinned messages would show the same things as a normal message, however now they just show the title. Now I have to open up each email to remind myself who it was from and what it was about...

In the current version you copy and paste email addresses. it would be helpful to be able to do that in this update.

Although there is a different range of themes, it'd be nicer if there were more as some of them are distracting or too childish.

I sent lots of emails and there isn't a button for template or maybe the icon has changed.

If I make Inbox subfolders and I defines rules to put corresponding emails into them, the Inbox does not report unread emails of subfolders if the Inbox directory is closed

I perform many roles within my company, and I really wish I could have the ability to switch between multiple e-mail signatures when composing e-mail via the Outlook 365 platform

Put automatic replies back in the settings drop down (rather than us now having to click on "view all settings") This is used often and should be easy to get to. You have made it more difficult, which makes no sense.

The ability to add, remove, or change the color for categories is not available for my O365 group calendars, I need this functionality as we post on-call schedules for our group members and use the colors to help people quickly identify their on-call time slots.

You're unable to re-arrange the order of calendars in a calendar group, and you're unable to re-arrange the order of calendar groups. The only way to "organize" this mess is to remove/delete and re-add the calendars/groups in the order you want. It's 2019, why are you making static lists. Be better, Microsoft.

I'd love to be able to have my Flagged or Category-assigned email at the top of my inbox, similar to how Pinned emails work currently. The issue with Pinned emails is that it doesn't translate to the desktop or mobile apps, which severely limits the usefulness of the option.

I miss the capability where I can share calendar availability while composing an email. It is in the old UX but does not appear to be in the New Outlook yet. This was really handy and I find myself switching back to the old UX often in order to compose an email when I know I want to embed available calendar times for myself to others.

Make status work as intended, and as it does on Old Outlook

Settings > Calendar > Events / Invitations > Default Reminders: "Never" should be a choice in the drop down.

Where is setting to have "Read" message receipts?

I was not getting notified when I received a new email. I had to go in and refresh the page and wait for it to load to see the new emails instead of it automatically popping up and notifying me.

There is too much white space between each folder name in the folder list, I would like to be able to see more of them at the same time. The less I need to scroll to organize my emails the better

In the month view, I can't see the actual appointments on my calendar. All I see its dots that I have to click on to view the appointments for that day.

can't import ics file

When you reply all it does not send an email to the addresses under Bcc.

Can't access the group/team onedrive to attach documents to an email. This is a MAJOR issue.