Turn on multi-factor authentication
Multi-factor authentication means you and your employees must provide more than one way to sign in to Microsoft 365 is one of the easiest ways to secure your business.
- Go to the admin center at https://admin.microsoft.com.
- Select Show All, then choose the Azure Active Directory Admin Center.
- Select Azure Active Directory, Properties, Manage Security defaults.
- Under Enable Security defaults, select Yes and then Save.
For new subscriptions Secure defaults are turned on automatically.
Next time the selected employees sign in, they'll be asked to set up the Microsoft Authenticator app on their phones for a second form of authentication.