Azure MFA provides an additional layer of security to protect your Azure resources from unauthorized access. This is achieved through a combination of authentication methods, including something you know, something you have, and something you are.
With Azure MFA, you can choose from multiple authentication methods, including phone calls, texts, and authenticator apps. This ensures that even if an attacker has your password, they won't be able to access your account without the additional verification step.
Azure MFA is a requirement for many Azure services, including Azure Active Directory Premium, Azure SQL Database, and Azure Storage. This is because these services handle sensitive data and require an additional layer of security to protect it.
By implementing Azure MFA, you can reduce the risk of data breaches and meet compliance requirements for security and identity management.
What is Azure MFA
Azure MFA is a trusted security feature that adds an extra layer of protection to your accounts. It's an addition to a two-step verification process that makes it much harder for attackers to gain access.
Even if a hacker knows your user ID and password, it's useless without an additional authentication method. This is especially true for common methods like facial recognition, fingerprint access, and registered mobile numbers.
The various methods used in Azure MFA include facial recognition, fingerprint access, registered mobile numbers, and more. These methods work together to provide a solid security guarantee for your accounts.
Azure MFA requires users to authenticate themselves using two or more methods in three broad categories: something you know, something you have, and something you are.
Types of Azure MFA
Azure MFA offers a range of authentication methods to secure access. Microsoft Authenticator allows users to approve sign-ins from a mobile app using push notifications, biometrics, or one-time passcodes.
There are multiple ways to enable MFA through Microsoft Entra, including FIDO2 security keys that provide access by signing in without a username or password using an external USB, near-field communication (NFC), or other external security key.
Certificate-based authentication enforces phishing-resistant MFA using personal identity verification (PIV) and common access card (CAC). Smart cards or devices can be used for authentication against Microsoft Entra ID for browser and application sign-in.
Passkeys allow for phishing-resistant authentication using Microsoft Authenticator. This method provides an additional layer of security.
Here are some of the authentication mechanisms offered by Entra MFA:
Configuration and Setup
To configure MFA for access in Azure, navigate to the Access controls section of your policy and choose Grant, then Require multi-factor authentication. This will prompt users to provide a second form of authentication in addition to their password.
To test your MFA setup, sign in to an app that requires MFA with a user account that the policy applies to. You should be prompted to provide a second form of authentication.
To enable Azure AD MFA as an ADSelfService Plus identity verification method, follow these steps: Navigate to Configuration > Self-Service > Multi-factor Authentication > Authenticators Setup.From the Choose the Policy drop-down, select a policy.Click Azure AD MFA.Enter the necessary information in the NPS Server, NPS Authentication Port, Authentication Method, Shared Secret, Username Pattern, and Request Timeout Settings fields.
Note that the Azure NPS extension must be installed and configured on the server, and a RADIUS client must be configured in the NPS for the ADSelfService Plus server. End users must also be enrolled in Azure AD MFA.
Oath Hardware Token
OATH Hardware Token is a small, portable device that generates one-time passwords (OTPs) for extra security in your Azure MFA setup.
These tokens use the Open Authentication (OATH) standard, which is an open standard for authentication.
OATH hardware tokens display an OTP that users must enter to verify their identity during sign-in.
Because OTPs are generated randomly and expire after a short time, OATH hardware tokens are highly secure and resistant to hacking attempts.
You can use OATH hardware tokens with Azure AD MFA, and they are supported by popular brands like Yubico and DeepNet Security.
Here are some benefits of using OATH hardware tokens with Azure AD MFA:
Steps for Configuration
To configure Azure AD MFA, you'll need to navigate to the Access controls section of your policy and choose Grant and then Require multi-factor authentication. This will enable users to provide a second form of authentication in addition to their password.
To select the apps that require MFA, go to the Cloud apps or actions section of your conditional access policy. You can choose to apply the policy to all cloud apps or specify individual apps.
To configure MFA for access, you'll need to set up additional authentication methods that users will need to provide when signing in. This could be a fingerprint, a face scan, a mobile app notification, or a phone call.
Here are the steps to configure Azure AD MFA as an ADSelfService Plus identity verification method:
- Navigate to Configuration > Self-Service > Multi-factor Authentication > Authenticators Setup.
- Select a policy from the Choose the Policy drop-down.
- Click Azure AD MFA.
- Enter the necessary information in the NPS Server, NPS Authentication Port, Authentication Method, Shared Secret, Username Pattern, and Request Timeout Settings fields.
- Click Test Connection & Save.
You can also modify the configuration by selecting Azure AD MFA and clicking Modify to change the information provided wherever necessary.
User Registration and Verification
User registration is a crucial step in setting up a security service, and it's essential to plan it efficiently. If you don't, all your security efforts will go to waste.
You can auto-enroll users using methods like voice or SMS authentication, which often have phone numbers and email addresses already captured. This makes the process seamless for both you and your users.
Azure MFA offers various verification methods, including phone call, SMS, and Authenticator app, which require active user involvement. You can choose the method that best suits your needs.
Azure AD MFA can be used for identity verification during AD self-service password reset or account unlock actions, endpoint machine logins for Windows, macOS, and Linux, and Outlook web logins.
User Registration Plan
Creating a user registration plan is crucial for any security service design. If you don't efficiently enroll new users, your security measures will be compromised.
You'll need to decide which user registration methods to use, such as voice or SMS authentication, which can auto-enroll users. This is ideal when you already have phone numbers and email addresses captured.
Other methods, like the Authenticator app, require active user involvement and can't be used for auto-enrollment. This means users will need to take extra steps to complete the registration process.
To make your user registration plan effective, consider the trade-offs between convenience and security. For example, auto-enrollment methods are convenient but may not be as secure as methods that require user involvement.
Verifying a User's Identity
Verifying a user's identity is a crucial step in the registration process. Azure MFA can verify a user's identity through various methods, including a phone call.
There are multiple ways Azure MFA can verify a user's identity, such as through phone call, SMS, or voice approval. These methods can be used in different scenarios, including AD self-service password reset or account unlock actions.
Azure AD MFA can be used for identity verification during various actions, including endpoint machine logins for Windows, macOS, and Linux, and Outlook web logins. It's essential to choose the right authentication method for each client's security and operational needs.
As an MSP, you have control over which MFA methods are available in each client tenant. You can evaluate the different options, such as Microsoft Authenticator, FIDO2 security keys, certificate-based authentication, passkeys, and SMS or voice approval, to determine which will work best for each client.
Here are some of the authentication mechanisms offered by Entra MFA:
- Phone call
- Microsoft Authenticator (push notifications, biometrics, or one-time passcodes)
- FIDO2 security keys
- Certificate-based authentication (PIV and CAC)
- Passkeys
- SMS or voice approval
The Microsoft Authenticator is a reliable default choice, easy to use, and available on all major mobile device platforms. It functions in several versatile modes, including passwordless authentication, OATH codes, and MFA push notifications.
Frequently Asked Questions
Is Office 365 MFA the same as Azure MFA?
Office 365 MFA and Azure MFA share some similarities, but Azure MFA offers more flexibility and can be extended beyond Office 365 and Azure. Azure MFA can even be deployed on-premises, giving you more control over your authentication needs.
Is Microsoft requiring MFA October 2024?
Yes, Microsoft is requiring multifactor authentication (MFA) for Azure portal, Microsoft Entra admin center, and Intune admin center starting October 15, 2024. Enable MFA by the deadline to maintain access.
How does MFA work?
Multi-factor authentication (MFA) works by requiring users to provide multiple forms of verification, such as a password, code, or biometric scan, to access an account. This adds an extra layer of security to prevent unauthorized access
Does Azure require MFA for all users?
Starting in 2024, Azure will require multifactor authentication (MFA) for all sign-in attempts. This mandatory MFA requirement aims to block over 99% of account compromise attacks.
Is Microsoft Authenticator 2FA or MFA?
Microsoft Authenticator is a Multi-Factor Authentication (MFA) solution that provides an easy and fee-free verification method for Microsoft 365 users. It's not a traditional 2-Factor Authentication (2FA) method, but rather a more secure and convenient MFA experience.
Sources
- https://www.sherweb.com/blog/cloud-server/multifactor-authentication-in-azure-active-directory/
- https://azure.microsoft.com/en-us/blog/announcing-mandatory-multi-factor-authentication-for-azure-sign-in/
- https://frontegg.com/guides/multi-factor-authentication-in-azure
- https://k21academy.com/microsoft-azure/az-500/azure-ad-multi-factor-authentication/
- https://www.manageengine.com/products/self-service-password/help/admin-guide/Configuration/Self-Service/azure-ad-mfa.html
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