iOS Login error: MS Teams and Authenticator app just loops

%3CLINGO-SUB%20id%3D%22lingo-sub-1351884%22%20slang%3D%22en-US%22%3EMS%20Teams%20and%20Authenticator%20app%20just%20loops%20on%20iOS%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-1351884%22%20slang%3D%22en-US%22%3EWhen%20I%20start%20MS%20Teams%20on%20my%20mobile%2C%20it%20just%20switches%20to%20the%20Authenticator%20app%20and%20then%20back%20to%20Teams%20-%26gt%3B%20MFA%20-%26gt%3B%20Teams%20-%26gt%3B%20MFA%20-%26gt%3BTeams%20-%26gt%3B%20MFA....%20in%20a%20infinite%20loop%3F!%3CBR%20%2F%3E%3CBR%20%2F%3EI%E2%80%99ve%20tried%20waited%205-10%20min%20with%20the%20phone%20looping%2C%20but%20I%20can%E2%80%99t%20still%20use%20the%20MS%20Teams%20app%20on%20iOS%20after%20around%2030%2B%20jumps%20between%20the%202%20apps.%3CBR%20%2F%3E%3CBR%20%2F%3EAnyone%20here%20with%20a%20clue%3F%3C%2FLINGO-BODY%3E%3CLINGO-LABS%20id%3D%22lingo-labs-1351884%22%20slang%3D%22en-US%22%3E%3CLINGO-LABEL%3EiOS%3C%2FLINGO-LABEL%3E%3CLINGO-LABEL%3ELogonError%3C%2FLINGO-LABEL%3E%3CLINGO-LABEL%3EMicrosoft%20Teams%3C%2FLINGO-LABEL%3E%3C%2FLINGO-LABS%3E%3CLINGO-SUB%20id%3D%22lingo-sub-1354683%22%20slang%3D%22en-US%22%3ERe%3A%20iOS%20Login%20error%3A%20MS%20Teams%20and%20Authenticator%20app%20just%20loops%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-1354683%22%20slang%3D%22en-US%22%3E%3CP%3EIn%20attachments%20you%20can%20see%20how%20it%20just%20switches%20between%20Teams%20and%20Authenticator%20app.%26nbsp%3B%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3EStarting%20teams%3A%26nbsp%3B%3C%2FP%3E%3CP%3E%3CSPAN%20class%3D%22lia-inline-image-display-wrapper%20lia-image-align-center%22%20image-alt%3D%2220200502_081111_iOS.png%22%20style%3D%22width%3A%20185px%3B%22%3E%3CIMG%20src%3D%22https%3A%2F%2Fgxcuf89792.i.lithium.com%2Ft5%2Fimage%2Fserverpage%2Fimage-id%2F188366i8148CBC6D62D53E7%2Fimage-size%2Fmedium%3Fv%3D1.0%26amp%3Bpx%3D400%22%20title%3D%2220200502_081111_iOS.png%22%20alt%3D%2220200502_081111_iOS.png%22%20%2F%3E%3C%2FSPAN%3E%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3ESwitches%20to%20authenticator%20app%3A%26nbsp%3B%3C%2FP%3E%3CP%3E%3CSPAN%20class%3D%22lia-inline-image-display-wrapper%20lia-image-align-center%22%20image-alt%3D%2220200502_0822222_iOS.png%22%20style%3D%22width%3A%20185px%3B%22%3E%3CIMG%20src%3D%22https%3A%2F%2Fgxcuf89792.i.lithium.com%2Ft5%2Fimage%2Fserverpage%2Fimage-id%2F188367iED9E151A00405189%2Fimage-size%2Fmedium%3Fv%3D1.0%26amp%3Bpx%3D400%22%20title%3D%2220200502_0822222_iOS.png%22%20alt%3D%2220200502_0822222_iOS.png%22%20%2F%3E%3C%2FSPAN%3E%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3ELoads%20in%20Authenticator%3A%26nbsp%3B%3C%2FP%3E%3CP%3E%3CSPAN%20class%3D%22lia-inline-image-display-wrapper%20lia-image-align-center%22%20image-alt%3D%2220200502_08333333_iOS.png%22%20style%3D%22width%3A%20185px%3B%22%3E%3CIMG%20src%3D%22https%3A%2F%2Fgxcuf89792.i.lithium.com%2Ft5%2Fimage%2Fserverpage%2Fimage-id%2F188365iCA84FA053227FDB5%2Fimage-size%2Fmedium%3Fv%3D1.0%26amp%3Bpx%3D400%22%20title%3D%2220200502_08333333_iOS.png%22%20alt%3D%2220200502_08333333_iOS.png%22%20%2F%3E%3C%2FSPAN%3E%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3EBack%20to%20Teams%3A%26nbsp%3B%3C%2FP%3E%3CP%3E%3CSPAN%20class%3D%22lia-inline-image-display-wrapper%20lia-image-align-center%22%20image-alt%3D%2220200502_084444444_iOS.png%22%20style%3D%22width%3A%20185px%3B%22%3E%3CIMG%20src%3D%22https%3A%2F%2Fgxcuf89792.i.lithium.com%2Ft5%2Fimage%2Fserverpage%2Fimage-id%2F188368iB2EE4DF9BE5FE4D8%2Fimage-size%2Fmedium%3Fv%3D1.0%26amp%3Bpx%3D400%22%20title%3D%2220200502_084444444_iOS.png%22%20alt%3D%2220200502_084444444_iOS.png%22%20%2F%3E%3C%2FSPAN%3E%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3EBack%20to%20authenticator%20again....%26nbsp%3B%3C%2FP%3E%3CP%3E%3CSPAN%20class%3D%22lia-inline-image-display-wrapper%20lia-image-align-center%22%20image-alt%3D%2220200502_0822222_iOS.png%22%20style%3D%22width%3A%20185px%3B%22%3E%3CIMG%20src%3D%22https%3A%2F%2Fgxcuf89792.i.lithium.com%2Ft5%2Fimage%2Fserverpage%2Fimage-id%2F188370i07B4739D23B8E0E8%2Fimage-size%2Fmedium%3Fv%3D1.0%26amp%3Bpx%3D400%22%20title%3D%2220200502_0822222_iOS.png%22%20alt%3D%2220200502_0822222_iOS.png%22%20%2F%3E%3C%2FSPAN%3E%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3E%3CBR%20%2F%3EAnd%20then%20loops%20this.%3C%2FP%3E%3CP%3EIn%20logon%20logs%20in%20admin%20center%2C%20this%20user%20have%20logon%20alot%20of%20times%20in%20the%20same%20minute.%26nbsp%3B%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-1362350%22%20slang%3D%22en-US%22%3ERe%3A%20iOS%20Login%20error%3A%20MS%20Teams%20and%20Authenticator%20app%20just%20loops%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-1362350%22%20slang%3D%22en-US%22%3E%3CP%3E%3CA%20href%3D%22https%3A%2F%2Ftechcommunity.microsoft.com%2Ft5%2Fuser%2Fviewprofilepage%2Fuser-id%2F643804%22%20target%3D%22_blank%22%3E%40JonasRR%3C%2FA%3E%26nbsp%3BI%20experienced%20the%20same%20symptoms%20-%20just%20moments%20after%20I%20applied%20a%20new%20Conditional%20Access%20Policy%20to%20my%20pilot%20user.%20Turns%20out%20I%20required%20the%20user%20to%20require%20both%20an%20Azure%20Hybrid%20joined%20device%20and%20an%20Intune%20compliant%20device%2C%20instead%20of%20requiring%20Any.%20After%20I%20switched%20it%20to%20Any%20Teams%20stopped%20looping%20for%20me...%26nbsp%3B%3C%2FP%3E%3CP%3EHope%20this%20helps%3C%2FP%3E%3CP%3E%3CSPAN%20class%3D%22lia-inline-image-display-wrapper%20lia-image-align-inline%22%20image-alt%3D%22whatisit_0-1588746613368.png%22%20style%3D%22width%3A%20400px%3B%22%3E%3CIMG%20src%3D%22https%3A%2F%2Fgxcuf89792.i.lithium.com%2Ft5%2Fimage%2Fserverpage%2Fimage-id%2F189406i92EF45391A7BB8F5%2Fimage-size%2Fmedium%3Fv%3D1.0%26amp%3Bpx%3D400%22%20title%3D%22whatisit_0-1588746613368.png%22%20alt%3D%22whatisit_0-1588746613368.png%22%20%2F%3E%3C%2FSPAN%3E%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-1363118%22%20slang%3D%22en-US%22%3ERe%3A%20iOS%20Login%20error%3A%20MS%20Teams%20and%20Authenticator%20app%20just%20loops%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-1363118%22%20slang%3D%22en-US%22%3E%3CP%3EThanks%26nbsp%3B%3CA%20href%3D%22https%3A%2F%2Ftechcommunity.microsoft.com%2Ft5%2Fuser%2Fviewprofilepage%2Fuser-id%2F542548%22%20target%3D%22_blank%22%3E%40whatisit%3C%2FA%3E%26nbsp%3B!%26nbsp%3B%3CBR%20%2F%3EThat%20might%20be%20the%20case...%26nbsp%3B%20But%20somehow%20it%20stopped%20for%20me%20after%20another%20reinstallation%20of%20Teams%20app.%26nbsp%3B%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3EBut%20the%20only%20policies%20I%20use%20in%20our%20tenant%20is%20the%20ones%20that%20are%20MS%20default%20preview%20conditional%20access%20policies%20for%20MFA%2C%20so%20maybe%20there%20are%20some%20wrong%20config%20in%20the%20default%20ones%20that%20I%20can't%20seem%20to%20edit..%26nbsp%3B%3CBR%20%2F%3E%3CBR%20%2F%3E%3CSPAN%20class%3D%22lia-inline-image-display-wrapper%20lia-image-align-left%22%20image-alt%3D%22MFA-default.png%22%20style%3D%22width%3A%20400px%3B%22%3E%3CIMG%20src%3D%22https%3A%2F%2Fgxcuf89792.i.lithium.com%2Ft5%2Fimage%2Fserverpage%2Fimage-id%2F189454i2EFB089FC731F865%2Fimage-size%2Fmedium%3Fv%3D1.0%26amp%3Bpx%3D400%22%20title%3D%22MFA-default.png%22%20alt%3D%22MFA-default.png%22%20%2F%3E%3C%2FSPAN%3E%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3C%2FLINGO-BODY%3E
Highlighted
Occasional Contributor
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?
3 Replies
Highlighted

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

 

Starting teams: 

20200502_081111_iOS.png

 

Switches to authenticator app: 

20200502_0822222_iOS.png

 

Loads in Authenticator: 

20200502_08333333_iOS.png

 

Back to Teams: 

20200502_084444444_iOS.png

 

Back to authenticator again.... 

20200502_0822222_iOS.png

 

 


And then loops this.

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

Highlighted

@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

whatisit_0-1588746613368.png

 

Highlighted

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.. 

MFA-default.png