| title | description | ms.date | manager | audience | ms.topic | ms.reviewer | ms.custom | ||
|---|---|---|---|---|---|---|---|---|---|
Troubleshoot common AD replication errors | Contains troubleshooting information to help you fix Active Directory replication errors. | 01/15/2025 | dcscontentpm | itpro | troubleshooting | kaushika, arrenc, justintu |
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This article contains information and links to help you troubleshoot Active Directory Replication errors. It is intended to provide Active Directory administrators with a method to diagnose replication failures and to determine where those failures are occurring.
Applies to: Windows Server (All supported versions)
Original KB number: 3108513
Note
Home users: This article is only intended for technical support agents and IT professionals. If you're looking for help with a problem, ask the Microsoft Community.
To troubleshoot specific errors, refer to the following table.
| Replication error code | Cause | Related Knowledge Base article |
|---|---|---|
| 8464 | This issue occurs because partial attribute set (PAS) synchronization is triggered when an attribute is added to the PAS. | Active Directory replication error 8464: Synchronization attempt failed |
| 8477 | This code is informational and represents a regular Active Directory replication operation. It indicates that replication is currently in progress from the source and has not yet been applied to the destination domain controller's database replica. | Troubleshooting AD Replication error 8477: The replication request has been posted; waiting for reply |
| 8418 | Attempts to replicate Active Directory when schema information is not consistent between the domain controller partners that are involved result in a Schema Mismatch error status. This symptom manifests itself in several ways. The underlying cause of the error may vary. | Troubleshooting AD Replication error 8418: The replication operation failed because of a schema mismatch between the servers involved |
| 1908 | This error has two primary causes:
| Troubleshooting AD Replication error 1908: Could not find the domain controller for this domain |
| 8333 | This error has multiple causes. They include the following:
| Troubleshooting AD Replication error 8333: Directory Object Not Found |
| 8589 | This error most commonly occurs on a domain controller after a replication partner has Active Directory forcibly removed and then is re-promoted before end-to-end replication can complete. This error can also occur when you rename a domain controller and the serverReference attribute is not updated. | Troubleshooting AD Replication error 8589: The DS cannot derive a service principal name (SPN) |
| 1818 | The issue occurs when the destination domain controller that is performing incoming replication does not receive replication changes within the number of seconds that is specified in the RPC Replication Timeout registry key. | Troubleshooting AD Replication error 1818: The remote procedure call was cancelled |
| 8446 | This error can occur when the Active Directory replication engine cannot allocate memory to run Active Directory replication. | Troubleshooting AD Replication error 8446: The replication operation failed to allocate memory |
| 8240 | This error indicates that the specific object could not be found in the directory. This error may be encountered in the following situations:
| Troubleshooting AD Replication error 8240: There is no such object on the server |
| 8451 | Status 8451: The replication operation encountered a database error has multiple causes. Refer to the related Knowledge Base article in the third column. | Active Directory Replication Error 8451: The replication operation encountered a database error |
| 1256 | This error is logged because of a connectivity failure. | Active Directory Replication Error 1256: The remote system is not available. |
| 1396 | Known causes of this error include the following:
| Active Directory Replication Error 1396: Logon Failure: The target account name is incorrect. |
| 1722 | Remote Procedure Call (RPC) is an intermediate layer between the network transport and the application protocol. RPC itself has no special insight into failures. However, it tries to map lower-layer protocol failures into an error at the RPC layer. | Active Directory replication error 1722: The RPC server is unavailable |
| -2146893022 | This error code is not returned by Active Directory. However, it may be returned by lower-layer components. These include RPC, the Kerberos protocol, Secure Sockets Layer (SSL), LSA, and NT LAN Manager (NTLM). The code is returned for various reasons. | Active Directory replication error -2146893022: The target principal name is incorrect |
| 1753 | Specific causes of this error include the following:
| Active Directory Replication Error 1753: There are no more endpoints available from the endpoint mapper |
| 8606 | Error 8606 is logged when the following conditions are true:
| Active Directory Replication Error 8606: Insufficient attributes were given to create an object |
| 1127 | Error 8606 is logged when the following conditions are true:
| Active Directory Replication Error 1127: While accessing the hard disk, a disk operation failed even after retries |
| 8452 | This error most frequently occurs when the replication topology in a domain controller that is starting replication differs from the replication topology that is defined in the destination domain controller's copy of Active Directory. | The naming context is in the process of being removed or is not replicated from the specified server |
| 8456 or 8457 | Incoming or outgoing replication was automatically disabled by the operating system because of multiple root causes. | 2023007 |
| 8453 | This Replication Access was denied error has multiple causes. | Active Directory replication error 8453: Replication access was denied |
| 8524 | This is a catch-all error for all possible DNS failures that affect Active Directory on post-Windows Server 2003 SP1-based domain controllers. | Active Directory Replication Error 8524: The DSA operation is unable to proceed because of a DNS lookup failure |
| 8614 | Causes of this error (and for NTDS Replication Event 2042) include the following:
| Troubleshoot Active Directory replication error 8614 |
| 8545 | This Active Directory replication error is logged when the source domain controller tries to send changes for a recently migrated object when the destination domain controller has the object present in a different partition. | Active Directory replication error 8545: Replication update could not be applied |
| 5 | This Active Directory replication error has multiple causes. | How to troubleshoot Active Directory replication error 5 in Windows Server: Access is denied |
To troubleshoot specific event IDs, refer to the following table:
| Event ID | Cause | Related article |
|---|---|---|
| Event ID 1311 | Fixing Replication Topology Problems | How to troubleshoot Event ID 1311 messages on a Windows domain |
| Event ID 1388 or 1988 | A lingering object is detected | 4469619 |
| Event ID 2042 | It has been too long since this machine replicated | 4469622 |
| Event ID 1925 | Attempt to establish a replication link failed due to DNS lookup problem | 4469659 |
| Event ID 2087 | DNS lookup failure caused replication to fail | 4469661 |
| Event ID 2088 | DNS lookup failure occurred with replication success | Event ID 2088: DNS lookup failure occurred with replication success |
If you need assistance from Microsoft support, we recommend you collect the information by following the steps mentioned in Gather information by using TSS for Active Directory replication issues.
