Allow to revert to the old Ribbon icon set in Outlook 2016 especially in Enterprise scenario.

I would like the option to send meetings requests with BCC so all information about all invitees is not shared with everyone that is invited

Also, Outlook calendar entries need BCC – without showing these!

In Microsoft Outlook 2016, when reply all to the email with attachments, the attachments are not available and we have to attach them manually. An option to reply all to the email with all the attachments included would be more productive in Microsoft Outlook 2016 as that option is not available as of now.

Enable an option to display declined meetings in teh calendar (in settings). Often initially one is not available for a meeting, but then due to changes of schedule might be able to join, but since that meeting is not displayed in calendar, simply forgets about that. I found that option very helpful in Google mail that we used up to now in the company.

The provided color schemes make it very difficult to distinguish folders

When I decline an invitation I do not see anymore on my calendar.
Moreover I am removed from the contacts of the invitation and if someone send an update of the timing of report meeting to all contact of the invitation I don't receive the update/report
It should be better to evidence in the invitation that i do not partecipate, but do not remove me, in this way I can receive updates and meeting report.

Sometimes the owner of a meeting (or, more often, meeting series) is on vacation or changes jobs; it would be nice if they could assign ownership of an instance (for vacation) or the full series (for job changes) to someone else.

Add 'Acknowledged' and 'Thanks' buttons to emails that will tell the sender you have seen/appreciate their email, without having to send another, thereby reducing email traffic.

It would be great if Outlook sync'd your email signature across multiple devices so that you only have to set or update it once.

When I'm writing an email, I would like to be able to type an email from my contacts into the "to" bar and have outlook autocomplete the email without me having to go to the contacts menu.

I use more than one machine to read & send emails using Outlook 365. I would like any signature that I create to be automatically synced (including with office.com) so that it is available regardless of which machine I am using.

The dark theme is great in Outlook, however the inability to change the background and text color of the reading pane make it almost painful.

It would be fantastic to have the ability to configure the default CSS for the reading pain and text/html therein.

It would be very useful to see declined meetings in outlook. Would me to let the organizer know i won't be there but will keep me up to date as to what's going on.

Meetings as FYI Only -

Please add a fourth meeting response option such as "Information Only" which automatically responds "Decline" but leaves the meeting info on your calendar. The meeting response would also automatically show the calendar as "FREE" with "No Reminder". This allows the user to change their response without having to sift through deleted emails or respond tentative leaving others to guess as to your meeting participation when you have no intention of going at all.

Want number/quantity of attendees invited/declined/accepted to meeting/appointment in scheduling assistant. Also there should be a possibility to highlight the row for a selected meeting attendee in the Outlook scheduling assistant. This will improve the readability: when scheduling with lots of attendees, it’s hard to discern which person is unavailable when all you see are blobs of blue with no name connected to them.

Add an option to create a new contact from email signature.

Provide an option to assign colors for incoming emails in Microsoft Outlook 2016 for easy identification. Designate my supervisors emails writing in Red as an example. Just being able to assign a font color to a person for incoming mail so they pop out at you. Especially when you receive hundreds of emails a day. I would rather have that then the little color boxes.

Do not change the history of meetings that have already occurred when make changes to a recurring meeting for future dates.