So I can join a teams call without hunting for it on other windows or the reminder popup.

Suggest a 'followup' feature:

-Allow me to flag an email with "Monitor for Reply"
-If I have not received a reply from somone on "To" line within a certain # of day, Outlook pops up a reminder that "You did not receive a response. Send reminder?"

It would be great to have Insights when sending mail from a distribution group or security group. Currently we send monthly Newsletters to partners across Microsoft and are unable to track the success rate of these with out moving to a CRM or dynamics.

Read confirmation for forwarded messages as it can be done with the new messages.

When I open Outlook, only one default calendar opens. I keep four opened most days and would like those same calendars to open each time like it does in the web client

Delayed send has been added for email messages.

Please add delayed send for meeting requests as well.

The docx, pptx, xlsx attachment can be directly previewed in Outlook, however, PDF cannot. You may use Edge as the keneral to let us be able to see the PDF file more quickly.

When we arrange a serial meeting and book a room for the serial meeting, the room is not always available. So we have to book the room individually or book the serial meeting individually. It will be good to add exception for a serial meetings.

If people want to share the email with many people and put an attachment but want some people to see it they should be able to lock the attachment.
But if someone is sending a mail to someone new they should be able to lock the mail so if it goes to someone else instead they won't be able to open it because of the password.

When a meeting invitee suggests a different time for a meeting, they should be notified of attendee responses in addition to the organizer.

Adding CC field in assigned tasks it is useful for person related/dependent to track task status and get notified about task status

Mail format .msg is very poorly supported outside of Outlook for Windows. Even Outlook for Mac can't open it. You should stick to the industry standard .eml which is already supported by Outlook, just not used by default on the save action.

When receiving a forwarded email, A) logically separate emails/collapse email participants listed in the body of the message--rather than list participants multiple times and in plain text, and B) allow for lookup of those participants.

This will ensure when the actual proposed slot invite comes, the calendar is reserved for the same.
Sometime, even before the proposed invite comes, calendar is blocked by someone else.