ERROR_DS_DRA_OBJ_NC_MISMATCH - 8545 (0x2161)

Technical Background

This error code, ERROR_DS_DRA_OBJ_NC_MISMATCH, is specific to the Windows Active Directory Domain Services (AD DS) replication mechanism. It indicates a failure in applying a replication update due to inconsistencies between the source and destination domains regarding recent cross-domain move operations.

Error Details

The error occurs when an attempt is made to apply a replication update, but either the source or the destination domain has not yet received information about a recent cross-domain move operation. This mismatch can lead to failure in synchronizing changes between domains.

Common Causes

• Incorrect Object Type: The object being moved might be of a type that does not support cross-domain moves, leading to replication issues.
• Exceeding Limits: There could be limitations on the number or frequency of cross-domain move operations that have been reached.
• Corrupted Data: Inconsistencies in the data related to the move operation can cause this error.

Real-World Context

This error typically arises during Active Directory replication processes, especially when dealing with objects that span multiple domains. It is crucial for administrators and developers to ensure that all relevant information about cross-domain moves is properly propagated across domains to avoid such errors.

Is This Error Critical?

Yes, this error can impact the integrity of the Active Directory forest by preventing necessary replication updates from being applied. It may lead to data inconsistencies or operational disruptions if not addressed promptly.

How to Diagnose

1. Review Operation Context: Verify that all cross-domain move operations have been correctly recorded and propagated across domains.
2. Validate Parameters: Ensure that the parameters used in replication updates are correct and consistent with the expected object types.
3. Confirm Object Types: Check if the objects involved support cross-domain moves, as some might not.

How to Resolve

1. Correct Parameter Usage: Use appropriate parameters for cross-domain move operations to ensure consistency across domains.
2. Adjust Operation Context: Ensure that all relevant information about cross-domain moves is properly propagated and synchronized between domains.
3. Restore Data: If data corruption is suspected, restore from a known good backup or repair the affected objects.
4. Retry Operation with Valid Inputs: Attempt to apply the replication update again using valid inputs once the context has been corrected.

Developer Notes

Developers should be aware of the specific requirements and limitations when working with cross-domain operations in Active Directory. Proper validation and synchronization mechanisms are essential to prevent such errors from occurring.

Related Errors

• ERROR_DS_DRA_SCHEMA_MISMATCH: Indicates a schema mismatch during replication.
• ERROR_DS_DRA_REPLICA_SET_CHANGE: Occurs when the replica set changes unexpectedly, affecting replication updates.

FAQ

Q: What does ERROR_DS_DRA_OBJ_NC_MISMATCH mean?

A: This error indicates that there is a mismatch in cross-domain move operation information between the source and destination domains during Active Directory replication.

Q: How can I prevent this error from occurring?

A: Ensure consistent propagation of cross-domain move operations across all relevant domains and validate parameters used in replication updates.

Summary

ERROR_DS_DRA_OBJ_NC_MISMATCH is a specific error code related to Active Directory replication, indicating issues with cross-domain move operation information. Proper management and synchronization of such operations are crucial for maintaining the integrity of the AD forest.