G Suite admins can now disallow SMS and voice authentication

Users of Google’s cloud-based suite of productivity apps may find when logging in that their usual two-factor authentication options (2FA, or 2-step verification, as Google calls it) have disappeared.

If G Suite users have previously been logging in with SMS or voice call verifications, they could now be asked to authenticate using another method such as Google’s Prompt system or a security token based on the FIDO/2.0 standards.

Hopefully, this won’t come as a surprise to users because their G Suite admins will have mentioned this change in their 2FA options to users in advance.