Microsoft 365 Administrator Expert MS-102 Practice Question
You manage identity synchronization for a Microsoft Entra tenant by using Microsoft Entra Connect Sync. After a recent migration, several new user accounts fail to synchronize to the tenant. In Synchronization Service Manager, the export stage shows error "AttributeValueMustBeUnique". You must quickly locate and remediate the duplicate attribute values in on-premises Active Directory before the next synchronization cycle. Which tool should you use?
Troubleshooting task in the Azure AD Connect wizard
The IdFix utility is designed specifically to scan on-premises Active Directory for issues that prevent objects from synchronizing to Microsoft Entra ID, including duplicate or invalid values that trigger the AttributeValueMustBeUnique error. Running IdFix lists the offending attributes and lets administrators correct them in bulk before the next sync. Azure AD Connect Health surfaces service health and performance data but does not enumerate individual duplicate attribute values. The Troubleshooting task in the Azure AD Connect wizard collects diagnostics; it does not discover directory-level duplicates. Active Directory Sites and Services provides replication configuration and cannot identify duplicate attribute values.
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How does the IdFix tool resolve synchronization errors?
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What does the 'AttributeValueMustBeUnique' error mean?
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When should Azure AD Connect Health be used instead of IdFix?
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Microsoft 365 Administrator Expert MS-102
Implement and manage Microsoft Entra identity and access
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