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Unable to Log Into Teams on iPhone. Error: Sign-in Error
Hello, Has anyone been able to resolve the Sign-In Error issue? It appears to be an issue between the Microsoft Authenticator app and Teams. Our organization is using Conditional Access policies ...
It looks like the issue was caused by Teams not applying an InTune policy. We're using InTune to manage Teams. For some reason, teams wasn't applying the organization's data management policy and was getting blocked. Teams wasn't showing the user that this app will be managed and needs to be restarted.
The resolution was to receive a message in Teams and not view it. Eventually, the user will receive an email stating that a teammate is trying to reach you in Microsoft Teams. Within that email, there is a link to 'Reply in Teams'. If the user opens that link on their mobile device, it correctly initiates data management policy and manages Teams. The user was able to successfully log into Teams.
I had a similar problem, suddenly could not join Teams meetings on my iPhone anymore because I had no internet, according to the app. But my iPhone was connected to the internet, other apps were connecting fine.
My solution was, go to Settings > Find the settings for Teams in the list of apps > Tick "Mobile data". Somehow this was switched off....
Hope this helps someone.