Forum Discussion

Christian Taveras's avatar
Christian Taveras
Iron Contributor
Oct 16, 2017

Multi-factor Authentication breaks outlook

Just wondering if anyone has run into this issue.     I have been Turning on MFA for users a group at a time all was going smooth.  The next morning after turning on MFA for the last hand full of u...
admin
exchange
office 365
security
RobIONDenver's avatar
RobIONDenver
Copper Contributor
Jan 12, 2022

I'm adding my discovery for anyone currently having the same issue; Microsoft 365, MFA, Business account. Having read through tons of the same issue and trying to solve myself, I was able to connect some dots. The issue is that Modern Authentication is not enabled for the domain.  When you log into M365 as admin, go to Settings tile, Org Settings, scroll to Modern Authentication and turn it on. This corrected the password loop in Outlook, as well as downloading Offline Address Book, and other Outlook oddities after turning on MFA. Hopefully this helps others.

Jay_Scott's avatar
Jay_Scott
Copper Contributor
Jan 13, 2022

RobIONDenver 

 

Our Org is set to modern authentication. When coming across users with password loops. I have to temporarily turn off their MFA and reset all MFA Factors, then change password, log them in to Outlook/Onedrive Sync/Word /Teams. THEN, once logged in, I work with the user to enter MFA Factors and THEN I re- enforce MFA on the user. It has been the only way to fix this for us.