External user with Microsoft account still receives one time verification codes

Brass Contributor

We enabled the one time passcode in our Azure Active Directory for external users.

This works great and external users (without an MS account) can login with receiving the one time pass code. 

In the AAD this looks like this:



You can see that the federation with "mail" has been added.


However, if a user later creates a Microsoft account and associates his e-mail address with it, he still needs the one time verification code to log into our apps.

If I delete the user form our AAD and re-invite him, I was hoping that the user can now use his MS account.

But unfortunately the mail stays and the user always uses his one time passcode.


Can you tell me how we can later switch to the MS Account login?

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