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A company has implemented Azure AD Connect with Pass-through Authentication (PTA). They want to ensure high availability for their authentication service. What is the minimum number of Pass-through Authentication agents that should be deployed in their on-premises environment to achieve this goal?
- AOne
- BTwo
- CThree
- DFour
Show answer & explanationAnswer & explanation
Correct answer: B. Two
For high availability with Pass-through Authentication, you need at least two agents. If one agent becomes unavailable, the other can continue to process authentication requests, ensuring uninterrupted service.
Why the other options are wrong
- A. One agent provides no redundancy and creates a single point of failure.
- C. Three agents provide more robust redundancy but two is the minimum for high availability.
- D. Four agents provide even greater redundancy, but two is the minimum requirement for high availability.
PTA High Availability
Ensuring continuous availability of Pass-through Authentication by deploying multiple agents.
- Requires at least two agents for redundancy.
- Agents are automatically load-balanced by Azure AD.
- Install agents on domain-joined servers, not domain controllers.
Memory trick: Two Agents, Always On, Always Ready.