Topic 1 Question #3
Note: The question is included in a number of questions that depicts the identical set-up. However, every question has a distinctive result. Establish if the solution satisfies the requirements.Your company has an Active Directory forest with a single domain, named weylandindustries.com. They also have an Azure Active Directory (Azure AD) tenant with the same name.You have been tasked with integrating Active Directory and the Azure AD tenant. You intend to deploy Azure AD Connect.Your strategy for the integration must make sure that password policies and user logon limitations affect user accounts that are synced to the Azure AD tenant, and that the amount of necessary servers are reduced.Solution: You recommend the use of federation with Active Directory Federation Services (AD FS).Does the solution meet the goal?
Answer: B
The scenario defines two mandatory requirements for the Azure AD hybrid identity integration: first, on-premises Active Directory password policies and user logon restrictions must apply to all user accounts synced to the Azure AD tenant, and second, the number of required on-premises servers must be minimized. The proposed solution of Active Directory Federation Services (AD FS) only satisfies the first requirement: when using AD FS federation, all Azure AD user authentication requests are routed to on-premises AD FS servers, which enforce on-premises password policies, logon hour restrictions, and account lockout policies in real time during authentication. However, AD FS fails to meet the second requirement, as a production-grade AD FS deployment requires multiple dedicated server roles: a minimum of 2 internal AD FS farm servers for high availability, 2 Web Application Proxy (WAP) servers in the perimeter network to support external authentication requests, and optionally a dedicated SQL Server instance to store AD FS farm configuration data. This results in a significantly higher number of required servers compared to alternative authentication methods such as Pass-through Authentication (PTA), which only requires lightweight agents installed on existing servers and also enforces on-premises policies during authentication. Since the proposed solution does not meet both stated requirements, it does not achieve the stated goal.
Option Analysis:
A. This option is incorrect. While AD FS federation does enforce on-premises Active Directory password policies and logon limitations for synced Azure AD users, it requires a large number of dedicated additional servers, which directly violates the requirement to minimize the number of necessary servers. The solution fails to meet both core requirements, so A is not a valid choice.
B. This option is correct. The proposed AD FS solution fails to satisfy the requirement to reduce the number of necessary on-premises servers, as production AD FS deployments require multiple dedicated server roles that significantly increase server overhead compared to other supported Azure AD Connect authentication methods. The solution does not meet all stated goals, so B is the correct answer.
Key Concepts:
1. Azure AD Connect Authentication Methods: This core concept covers the three primary hybrid identity authentication models for Azure AD: Password Hash Sync (PHS), Pass-through Authentication (PTA), and Federation (AD FS). Each model has distinct infrastructure requirements and capabilities for enforcing on-premises identity policies for cloud authentication, which is a core component of the AZ-500 identity and access management domain.
2. AD FS Deployment Requirements: Production AD FS implementations require redundant, dedicated server roles for the AD FS farm and Web Application Proxy layer to ensure high availability and secure external access, resulting in substantially higher on-premises server overhead than PHS or PTA, making it unsuitable for scenarios that require minimal server footprint.
3. Hybrid Identity Policy Enforcement: For real-time on-premises Active Directory password policies, logon restrictions, and account lockout policies to apply to Azure AD authentication attempts, either AD FS federation or Pass-through Authentication (PTA) is required, as Password Hash Sync performs authentication directly in Azure AD and does not query on-premises AD for policy checks during cloud logins.
References:
What is Azure AD Connect? Microsoft Learn,
https://learn.microsoft.com/en-us/azure/active-directory/hybrid/whatis-azure-ad-connect
Azure AD Connect federation with AD FS, Microsoft Learn,
https://learn.microsoft.com/en-us/azure/active-directory/hybrid/how-to-connect-fed-whatis