I'm currently using an iPhone 13 Pro Max running iOS 16.6.1. I setup two email accounts on my iphone when I purchased the phone in early 2022: Gmail & Outlook; both email accounts were setup to use the Microsoft Authenticator. Subsequent to adding the email accounts to the Microsoft Authenticator, my Outlook email account was setup as passwordless.
I've had no problems using iPhone mail until Nov 11, 2023. At that time, my Outlook email account would not refresh with newer emails. A message at the bottom of the screen says "Account Error: Outlook. Details...".
When I click on "Details...", I get the pop-up "Cannot Get Mail" "No password provided for 'Outlook'".
When I click "Settings", it takes me to the "Outlook" screen which says "Account not Authenticated".
When I click the link "Re-enter Password" it takes me to the Microsoft Authenticator, which, after authenticating, does not resolve the problem. I'm back where I started.
Just today, I installed the Microsoft Outlook app from the iPhone App Store. Using the Microsoft Outlook app, I now receive all of my Outlook email.
I guess using the Microsoft app will be my "work-around" until Apple can solve this issue.