The fact that users cannot change their display name within Outlook is, quite frankly, inexcusable in the year 2022. We were able to do this with various email platforms in the 1990s. And platforms such as Gmail allow us to do this right now. So, why not Outlook?
We should be able to edit the First and Last names simply by going to Preferences, clicking the email account, and typing in the First and Last name that we need. That functionality is nonexistent in both Outlook mobile AND desktop for Mac (both Office 365).
Please note that this is especially a problem for professional-businesses-domain IMAP accounts that end up having their email address appear as the display name, when it should be the sender's name that appears. That is, the sender's First and Last name do not import into Outlook when you add the account to Outlook; instead, the email address appears where the First and Last name should appear. I have used all of the workarounds that I know of in order to try and replace the email address with a First and Last name, but nothing works.
The only thing that will solve this problem is if Microsoft updates both the desktop and iOS versions of Outlook so that the First and Last names are EDITABLE.
Please Microsoft... are you listening?