The shims to make Outlook Mail work correctly in GNOME Web (it's broken on Microsoft's end) will probably be removed. I suggest a different email provider and POP3/IMAPX if you continue using Outlook.
I posted questions about Outlook on MSFT's forum last week. Only replies are from tech support scams.
I'm angry that I spent so much time trying to fix MSFT's broken website in the first place.
Looking at their site with the Inspector, I suggest switching email providers for security reasons.