How to Fix Microsoft Entra Connect Domain Synchronization Errors
Question details
The user needs to resolve domain synchronization errors in Microsoft Entra Connect after setting up an on-premises Active Directory forest or selecting the wrong Microsoft 365 domain.
- Product
- Microsoft Entra Connect
- Device & OS
- not provided
- Scenario
- Managing hybrid identity and synchronizing an on-premises Active Directory environment with Microsoft 365.
- Observed behavior
- Domain synchronization fails or creates orphaned objects due to misconfigured source anchors, domain settings, or synchronization rules.
Ensure you have Global Administrator or Hybrid Identity Administrator privileges in Microsoft Entra ID and Enterprise Admin rights in your on-premises Active Directory before adjusting configuration settings.
Review and Correct Entra Connect Settings
Verify essential configuration parameters such as the verified domain, source anchor, and synchronization rules to restore accurate domain mapping.
Incorrect settings applied after establishing a new Active Directory forest or moving to a different tenant can break the mapping between local and cloud objects.
Log into the Microsoft 365 Admin Center, navigate to Settings > Domains, and ensure the correct custom domain is added and its status is marked as 'Healthy'.
Open the Microsoft Entra Connect wizard on your server and confirm that the correct source anchor (usually mS-DS-ConsistencyGuid or objectGUID) is selected to definitively link local and cloud objects.
Open the Synchronization Rules Editor to inspect inbound and outbound rules for any misconfigurations or scope filters that might be excluding your target objects.
Ensure that the user attributes in your on-premises Active Directory, such as UPNs and proxyAddresses, match the intended routing domains established in Microsoft 365.
Force a Manual Synchronization Cycle
Trigger a manual sync to apply your domain and rule corrections immediately rather than waiting for the default interval.
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Frequently Asked Questions
What causes an object synchronization error in Microsoft Entra Connect?
Errors typically occur due to duplicate attribute values across accounts (such as overlapping UPNs or proxy addresses), missing verified domains in the Microsoft 365 admin center, or choosing an incorrect source anchor during the initial wizard setup.
How do I change the selected Microsoft 365 domain in Entra Connect?
You cannot directly swap the tenant domain on an actively synchronizing server. You must run the Microsoft Entra Connect wizard, select 'Customize synchronization options,' and update your domain mapping settings, or fully reinstall the tool if moving to a completely different tenant.
What is a source anchor in hybrid identity synchronization?
The source anchor is an immutable attribute, such as objectGUID or mS-DS-ConsistencyGuid, that uniquely and permanently links an on-premises Active Directory object to its exact corresponding object in Microsoft Entra ID.
Where can I get specialized support for orphaned objects in Exchange Hybrid setups?
For advanced troubleshooting involving orphaned objects or hybrid routing issues, Microsoft advises administrators to share configuration details and error logs in the Microsoft Q&A Office-Exchange-Hybrid-ITPro forum.
