MFA Fatigueはノーティフィケーションを出すアプリで防げないものなのかな、と思ったら電話かけてくるやつもあるの？
https://techcommunity.microsoft.com/t5/microsoft-entra-azure-ad-blog/defend-your-users-from-mfa-fatigue-attacks/ba-p/2365677
TECHCOMMUNITY.MICROSOFT.COMDefend your users from MFA fatigue attacksProtecting users from MFA fatigue attacks With increasing adoption of strong authentication, multi-factor authentication (MFA) fatigue attacks (aka, MFA spamming) have become more prevalent. These attacks rely on the user’s ability to approve a simple voice, SMS or push notification that doesn’t ...