Security defaults is basically a feature in Azure AD. This gives added security to your account while you are trying to access any services/resources in Azure Active directory.
Whatever that comes with under Azure Active Directory will have an impact of security defaults. Mainly Authentications that happen while user log in to Azure portal, or user tries to access any resource in Azure with any Azure AD account will be prompted for MFA.
About AAFT tool, if authentication is required to access AAFT tool then, the account which goes for an authentication to Azzure AD will have an impact of security defaults.
However, Microsoft is making security defaults available to everyone, because managing security can be difficult. Identity-related attacks like password spray, replay, and phishing are common in today's environment.
The goal is to ensure that all organizations have at least a basic level of security enabled at no extra cost.
You can refer below article to get more details on security defaults,
Below are the changes that will take effect once security defaults is enabled,
- Requiring all users to register for Azure AD Multi-Factor Authentication.
- Requiring administrators to do multifactor authentication.
- Requiring users to do multifactor authentication when necessary.
- Blocking legacy authentication protocols.
- Protecting privileged activities like access to the Azure portal.
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