iOS Login error: MS Teams and Authenticator app just loops

[JonasRR]

When I start MS Teams on my mobile, it just switches to the Authenticator app and then back to Teams -> MFA -> Teams -> MFA -> Teams -> MFA.... in a infinite loop?!

I’ve tried waited 5-10 min with the phone looping, but I can’t still use the MS Teams app on iOS after around 30+ jumps between the 2 apps.

Anyone here with a clue?

[#2]

In attachments you can see how it just switches between Teams and Authenticator app. 

Starting teams: 

Switches to authenticator app: 

Loads in Authenticator: 

Back to Teams: 

Back to authenticator again.... 

And then loops this.

In logon logs in admin center, this user have logon alot of times in the same minute. 

[#3]

@JonasRR I experienced the same symptoms - just moments after I applied a new Conditional Access Policy to my pilot user. Turns out I required the user to require both an Azure Hybrid joined device and an Intune compliant device, instead of requiring Any. After I switched it to Any Teams stopped looping for me... 

Hope this helps

[#4]

Thanks @whatisit ! 
That might be the case...  But somehow it stopped for me after another reinstallation of Teams app. 

But the only policies I use in our tenant is the ones that are MS default preview conditional access policies for MFA, so maybe there are some wrong config in the default ones that I can't seem to edit..