In Case You Missed It—Your Battle.net Authenticator is Changing, StuRedman.
Your account is still set up to use the legacy Battle.net® Authenticator app, which will be retired on 5 January 2024. Download the new Battle.net mobile app now and migrate your authenticator to avoid any issues logging in.
After migrating to the new app, you should remove the legacy authenticator app from your device.
If you don’t migrate, your authenticator will be removed from your account and you’ll no longer be protected or able to use the authenticator app to approve login requests. We’ll reset your password and send details on setting up a new password to your email address.
That’s at least the third mail like that I got.
I used the authenticator app on my phone after my keyfob started to weaken, and when it got discontinued I removed it from my account.
Do they sent this just to everyone who hasn’t installed the mobile Bnet app?
Yeah. The system checks for accounts that haven’t migrated the old mobile authenticator over to the mobile Battlenet app and sends out those warnings.
As for the Bnet app, people don’t have to actively use it if they don’t want to. You can stay logged out and still have the authenticator work.
One word of warning though: don’t uninstall the old authenticator until the Bnet app is set up. If you do, it makes the Bnet app setup a pain. Once the Bnet app is set up, then the old authenticator can be uninstalled.
Edit: Actually, two words of warning: before doing any of that, write down or screenshot the authenticator’s SN and Restore code just in case something goes wrong. That makes it much easier for Support to straighten any hitches out.