Microsoft 365 Administrator Expert MS-102 Practice Question
Your organization has two on-premises Active Directory forests that will be synchronized to a single Microsoft Entra tenant. Security policy requires that:
User passwords remain on-premises and are validated through pass-through authentication (PTA) with seamless single sign-on (SSO).
Microsoft 365 groups created in the cloud must be written back to an on-premises forest for use by on-premises applications. You want to deploy the fewest possible additional SQL Server instances. Which synchronization solution should you implement?
Deploy Microsoft Entra Connect Sync on a single server and configure it for pass-through authentication with seamless single sign-on.
Deploy Microsoft Entra Connect Sync in staging mode only.
Deploy Microsoft Entra Cloud Sync agents in each forest and enable password-hash synchronization.
Use Microsoft Entra Cloud Sync together with Active Directory Federation Services (AD FS) for authentication.
Microsoft Entra Cloud Sync can only perform password-hash synchronization and currently offers no write-back capabilities, including group writeback, nor does it support pass-through authentication with seamless SSO. Deploying it would therefore fail to meet both stated requirements. Microsoft Entra Connect Sync supports pass-through authentication with seamless SSO as well as group writeback, fully satisfying the scenario. It installs a local SQL Express instance automatically, so no separate SQL Server deployment is required beyond the single Connect Sync server itself. Running Connect Sync in staging mode would not actively synchronize objects, and combining Cloud Sync with AD FS would still lack group writeback. Consequently, deploying Microsoft Entra Connect Sync configured for PTA and SSO is the only option that meets all requirements.
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What is pass-through authentication (PTA) in Microsoft Entra Connect Sync?
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What is group writeback in Microsoft Entra Connect Sync?
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Why is Microsoft Entra Cloud Sync not suitable for this scenario?
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Microsoft 365 Administrator Expert MS-102
Implement and manage Microsoft Entra identity and access
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