Question

You are preparing to deploy Microsoft Entra Connect Sync to synchronize your on-premises Active Directory to Microsoft 365. Before running the initial synchronization, you run the IdFix tool against the directory. IdFix reports several objects with an ERROR of type 'duplicate' in the proxyAddresses attribute and several with 'format' errors in the userPrincipalName attribute. You want to correct these issues efficiently while minimizing manual editing in Active Directory Users and Computers. What should you do?

Accepted Answer

Accept the suggested EDIT values in the IdFix results, then use the Apply action within IdFix to write the corrections back to Active Directory.

Answer

Ignore the errors and proceed with synchronization, because Entra Connect Sync automatically resolves duplicate and format issues during the initial sync cycle.

Answer

Export the errors to CSV and manually edit each object in Active Directory Users and Computers, then re-run IdFix to confirm.

Answer

Configure attribute filtering in Entra Connect Sync to exclude proxyAddresses and userPrincipalName from synchronization.