So my company decided to migrate office suite and email etc to Microsoft365. Whatever. But for 2FA login they decided to disable the option to choose “any authenticator” and force Microsoft Authenticator on the (private) phones of both employees and volunteers. Is there any valid reason why they would do this, like it’s demonstrably safer? Or is this a battle I can pick to shield myself a little from MS?
That might be an optional requirement which can be set by the admins. On my phone (Android) I have disabled location permissions for the MS Authenticator app. I have no issues logging in. I also regularly have to deal with alerts for users with improbable geographic logins, because they have a VPN on their phone. So, they login from their PC from one location and then their phone logs into Azure from the other side of the planet moments later.
Yes it’s optional. A lot of companies have compliance requirements where none of this would fly.