It should be great to put the dash icons not near the flag, sometimes we delete email instead of marking them.

SPAM is not as simple as a “yes” or “no” answer. Users should be able to add a column in Outlook to display the SCL and BCL values at a glance. Today it requires a good bit of knowledge and extra hoop jumping to examine the headers to get these details that can otherwise be very valuable to an end user trying to determine the value of an email.

Please set an option to allow for Outlook Email to open in view unread email rather than all email.

In Outlook 2010, while inserting an attachment from File Manager, I could cut the filename (without the extension; thumbs up) and paste it in the subject line, then go back and insert the attachment.
With 2016, I LOVE the Recent items list, when attaching a file, but have no way of cutting the filename to paste it into the subject line. I have to attach the Recent file, then save as, and cut it from that dialogue box. Then I paste it into the subject line and backspace through the extension info.
Thanks!

To mark a message as unread, you have to right-click on it and select "Mark as unread" or use Ctrl+U. You can also configure the view to show a "Read" status envelope icon, but clicking on this icon does not change the status.

I think this is a design flaw - right now the envelope icon serves no functional purpose because unread messages are already highlighted (bold). The icon should work as a button to quickly "Mark as read/unread" without having to use the right-click menu or a keyboard shortcut.

Like to see a Email Recipient Reminder, something that will pop-up on a person's screen to say, have you attended to this email?
It needs to be a function that when sending to someone they receive a pop-up message to say, "Would you like us to remind you to action this email?". The sender would have to firstly elect to use this option.

PIN for some files in attachment while composing. We use some files regular and want to PIN them in compose window, so everytime it save lot of time.

Make the attachment icon brighter in dark mode.

O365 for Business has the send later option added as a drop-down from the send button when composing a new email. Add this to O365.

Email states the local time of both sender and receiver ... to enable chronological tracking of emails within one day

Often times, emails are back and forth among number of people to discuss a certain topic. Then we want to switch to new topic but with same group of people. For this, it would be useful to have an ability to "Replay All as New Email". This way, you can start new conversation with same group of people easily and cleanly.

There are many users that have many rules activated on their Outlook accounts. In the Desktop client, you cannot easily search these rules to find ones you know to be out of date, etc. I spend far too much time sifting thru my rules to find the one I need to update, disable, or delete.

Current: After typing any word or statement user realise that they want to change the alphabets from Capital to Small letters or vice versa, they have to delete everything they typed and then re-type.

New Proposed Idea: After tying statement or word user should select the statement or word and then hit Caps Lock button to change the alphabets from Capital to Small or Small to Capital letters.

This idea will save lots of people time and same can be implemented on Outlooks applications.

Ability to email everyone except a specific recipient (or multiple recipients) when emailing a distribution list.

on my android phone, I love that I can snooze an inbox for weekends, outside business hours and until I wish to restart it. I would love this feature in outlook app for windows 10.

Add read/unread bar on left hand side for all views. Not just compact view. It's nice to see the "columns" row and have the feature to click to mark as read.

Create a button for "user templates in file system" that we can add to our desired ribbon. At this time you only have Choose Form as a button that can be added to a ribbon.
Having to navigate to Choose form, then scroll down to finally get the to option of "User Templates in File System" is often resulting in taking more time than actually typing an email when it is a simple, short message. This means people are avoiding using this tool as it is not convenient.

It would be great if the 'attach file' option was categorized recent files by OneDrive/Cloud and Computer locations. Currently it only shows recent items and mixes both OneDrive/computer location causing duplicates. It is very confusing.

Ideal update would have files saved on OneDrive/Cloud on the top then a line break then files saved locally to the computer.

If this is not possible then just stop recognizing OneDrive as a local file location which would prevent duplicates. Especially since you have the option to attach a file as a copy from OneDrive.