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Microsoft AB-900 Exam - Topic 2 Question 12 Discussion

Your organization has a Microsoft 365 E5 subscription.You need to ensure that a third-party cloud service can authenticate to Microsoft Entra.What should you configure?
D) an app registration
A) a Microsoft 365 Copilot connector
B) multifactor authentication (MFA)
C) a Conditional Access policy

Microsoft AB-900 Exam - Topic 2 Question 12 Discussion

Actual exam question for Microsoft's AB-900 exam
Question #: 12
Topic #: 2
[All AB-900 Questions]

Your organization has a Microsoft 365 E5 subscription.

You need to ensure that a third-party cloud service can authenticate to Microsoft Entra.

What should you configure?

Show Suggested Answer Hide Answer
Suggested Answer: D

The correct answer is D. an app registration. Microsoft Learn states that to delegate identity and access management functions to Microsoft Entra ID, an application must be registered with a Microsoft Entra tenant. When you register an application, you create its identity configuration in Microsoft Entra, and a corresponding service principal is created so the application can authenticate and integrate with the tenant. This is the standard Microsoft mechanism for allowing a third-party cloud service or app to authenticate to Microsoft Entra.


by Kara at Jul 01, 2026, 12:08 PM

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Antonio
3 days ago
I think D is the best choice. App registration is key for third-party services.
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Dorothy
8 days ago
An app registration? I didn't expect that!
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Corazon
13 days ago
I thought Conditional Access was the answer, but I guess not?
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Elke
18 days ago
Wait, why not just use MFA? Seems easier.
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Fatima
23 days ago
Definitely agree, D is the way to go!
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Jillian
29 days ago
You need to set up an app registration for that.
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Rory
1 month ago
I'm a bit confused about whether MFA is necessary here; it seems more related to user access rather than third-party service authentication.
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Lenita
1 month ago
I practiced a similar question where we had to set up authentication for an app, and I think it involved app registration, but I could be mixing it up with something else.
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Reynalda
1 month ago
I remember something about Conditional Access policies being important for security, but I can't recall if they specifically apply to third-party authentication.
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Lorita
2 months ago
I think we might need to look at app registrations for third-party services, but I'm not entirely sure if that's the only step needed.
upvoted 0 times
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