I and my users are unable to sign in successfully to the Windows 10 Mail and Calendar apps.
We are in a domain environment and are using MFA. We do not have an on-prem Exchange, fully 365 with Hybrid AD.
Windows Version 21H1 19043.1052
Mail Version 16005.13426.20920.0
I have MFA bypassed my account during testing, information provided to app (user/pass) is accurate


The next display suggests everything has been configured correctly, however



You are then directed to re-complete the "Advanced" section of the original form. Which again fails.
As an additional measure, I have enabled "allow users to create apps passwords to sign in to non-browser apps"

However, the option is not available?

I have uninstalled (via PowerShell) the mail and calendar app. Re-installed and updated (via Windows store suggests, latest version)
I'm struggling to figure this one out and would like to have further understanding of the issue.