We've finally come to an agreement so I can move forward, but I find it interesting that a basic question of yes or no it works or doesn't has been so elusive. They initially content that it's not within their scope. We've spent the better part of two days just going back and forth agreeing on scope. I opened a ticket with Office 365 support, but it's slow going. App Passwords add a complexity and confusion that I try to avoid. It's not that it won't work, but rather that App Passwords are really hard to explain to average users.

The account can be configured, but it requires the use of an App Password. MFA is active via the web and via mobile, but Outlook 2016 will not present the modern authentication screen when initially wiring up the MSA (using autodiscover, maybe manual would be different). I've established MFA on the MSA and it's functioning properly. The Office 365 MFA experience is behaving as expected. Many have existing MSAs that they use for personal email and they want those in Outlook 2016, side-by-side with their Office 365 email account. I've been working with customers to enable MFA on all Office 365 accounts. I am not talking about an MSA that is using a duplicate work account.

I am talking about a consumer account (,, ).

I understand the requirement on the Office 365 side to enable the tenant for modern authentication. I am not talking about Office 365 Azure AD MFA enabled account. I thought that the answer to this question was yes, but my recent experience is no. In other words, is modern authentication (notification, text, call) capable when wiring up an MSA to Outlook 2016? Does Outlook 2016 support MFA enabled MSAs without requiring the use of App Passwords?

Two step authentication outlook 2016