Microsoft 365 Administrator Expert MS-102 Practice Question
Your organization synchronizes identities to Microsoft Entra ID by using Pass-through Authentication (PTA) and Seamless single sign-on. Several users suddenly cannot sign in to Microsoft 365; they enter their passwords but receive an error message. In the Microsoft Entra sign-in logs, the Failure reason field shows "The Azure AD Pass-through Authentication agent is offline" and the Authentication Details tab lists the Agent time-out error. To restore user sign-in as quickly as possible, what should you do first?
Run Start-ADSyncSyncCycle -PolicyType Initial to force a full directory synchronization.
Reconfigure Microsoft Entra Connect to switch the tenant to Password Hash Synchronization only.
Temporarily assign affected users the Authentication Administrator role in Microsoft Entra ID.
Start the Azure AD Connect Authentication Agent service on an existing PTA agent server.
Pass-through Authentication requests are queued in Microsoft Entra ID and forwarded to the on-premises PTA agents. If no agent responds within the 30-second time-out, authentication fails for all users. The fastest remediation is to bring at least one agent back online by starting the Azure AD Connect Authentication Agent service on a server where the agent is installed. Once an agent is running, new password validations are processed immediately. Triggering a directory sync, changing the tenant's authentication method, or assigning administrative roles does not re-establish the required agent connectivity and therefore will not restore sign-in for users as quickly.
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Microsoft 365 Administrator Expert MS-102
Implement and manage Microsoft Entra identity and access
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