Microsoft announces
To help protect your organization, we're always working to improve the security of Microsoft cloud services. As part of this, we enable the Security Defaults setting in your tenant that includes multi-factor authentication, which can block more than 99.9 percent of identity attacks that attempt to compromise your accounts.
When you log in to your account, a message will appear prompting you to proactively enable security defaults. If you haven't logged in or enabled this option, we will automatically enable it for you.
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When the option is enabled, everyone in your organization should sign up for multi-factor authentication. To avoid confusion, let your users know what to expect:
- When they sign in to their account, they will see a message asking them to install the Microsoft Authenticator app. They can choose to install it and follow the steps to register their account or postpone the action. After 14 days, the deferral option will disappear.
- They must follow the steps How to set up the Microsoft Authenticator app to download the app on their mobile device and then register their account in the app.
Read the full details about the security defaults setting. If you have any questions or need help, please contact support.