Medium1 markMultiple Choice

AZ-305 · Question 12 · Domain 1.2: Authentication and Authorization

A financial institution is designing a hybrid identity solution. They use on-premises Active Directory and want to synchronize identities to Microsoft Entra ID.

Security policies strictly prohibit any form of user password hashes from being synchronized to or stored in the cloud. However, users must be able to sign in to Microsoft 365 and Azure using their on-premises Active Directory credentials. The solution must provide high availability for authentication even if a single on-premises server fails.

Which authentication method should you recommend?

Answer options:

A.

Password Hash Synchronization (PHS)

B.

Pass-through Authentication (PTA) with multiple Authentication Agents

C.

Active Directory Federation Services (AD FS) with a single server

D.

Azure AD Domain Services

How to approach this question

Identify the constraints: 'no password hashes in cloud' rules out PHS. 'High availability' requires multiple agents/servers. PTA is simpler than ADFS.

Full Answer

B.Pass-through Authentication (PTA) with multiple Authentication Agents✓ Correct
Pass-through Authentication (PTA) allows users to sign in to cloud applications using their on-premises passwords by validating the credentials directly against the on-premises Active Directory. This ensures no password hashes are stored in the cloud. Deploying multiple PTA agents on different on-premises servers provides the required high availability.

Common mistakes

Choosing AD FS. While AD FS works, PTA is the modern, simpler recommendation unless specific complex federation requirements exist. Also, the AD FS option listed only has a single server, failing the HA requirement.

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