Hi,
Thank you for writing to Microsoft Community Forums.
I understand that you’re facing issues when using Microsoft Authenticator app on your iPhone, and I certainly appreciate your efforts in trying to resolve the issue.
We will certainly look into this for you.
We tried reproducing the issue on our lab machines, and we were able to use the authenticator app normally.
One of the things that I would suggest is to try reinstalling the app and see if you’re able to use it fine.
Regards,
Prakhar Khare
Microsoft Community – Moderator