Error AtlasError Documentation and ResolutionActive Directory documented errors
Browse Active Directory error messages, error codes, troubleshooting explanations, and practical fixes with exact wording and search-friendly reference pages.
This Active Directory error reference is designed for users searching exact Active Directory error messages, error codes, and clear how-to-fix guidance.
Active Directory troubleshooting is usually highly operational: users arrive with a replication error code, an RPC failure, a DNS issue, or a security principal mismatch and need to know which controller, object, or trust path is actually broken.
This hub keeps Active Directory error messages in a form that supports both exact `repadmin` or event-text searches and broader browsing across replication, authentication, and directory consistency failures.
Authentication
Authentication errors
8453Active Directory replication access was deniedActive Directory replication failed because the destination controller or operator lacked the permissions required for the requested replication action.
8589Active Directory replication failed because the DS could not derive an SPNActive Directory replication failed because the local directory database lacks the information required to derive the target server's service principal name for mutual authentication.
-2146893022Active Directory replication failed because the target principal name is incorrectActive Directory replication failed because Kerberos authentication between domain controllers could not validate the expected service principal name.
5Active Directory replication failed with Access is deniedActive Directory replication could not continue because the destination controller or caller lacked the access required to perform the replication operation.
Configuration
Configuration errors
8451Active Directory replication encountered a database errorActive Directory replication failed because the domain controller hit a database-level problem such as corruption, index damage, lingering-object issues, or related storage faults.
8606Active Directory replication failed because insufficient attributes were given to create an objectActive Directory replication hit lingering-object or object-lifecycle inconsistency problems, so the destination controller could not reconstruct the object update safely.
8464Active Directory replication failed while syncing the partial attribute setActive Directory replication could not update the partial attribute set on a global catalog, which usually points to schema or forest-wide replication consistency problems.
Networking
Networking errors
1908Active Directory operation failed because it could not find the domain controller for the domainActive Directory could not locate a domain controller for the required domain, which usually indicates DNS, locator, or service registration issues.
1753Active Directory replication failed because no endpoints were available from the endpoint mapperActive Directory replication reached the remote RPC endpoint mapper, but the required replication service endpoint could not be resolved or was not registered correctly.
8524Active Directory replication failed because of a DNS lookup failureActive Directory replication could not continue because the destination controller could not resolve the source domain controller through DNS.
1727Active Directory replication failed because the remote procedure call failed and did not executeActive Directory replication reached the RPC layer but the remote call still failed before the operation could complete successfully.
1256Active Directory replication failed because the remote system is not availableActive Directory reported error 1256 when replication could not proceed because the source controller or required network path was not available at the time of the attempt.
1722Active Directory replication failed because the RPC server is unavailableActive Directory replication could not connect from one domain controller to another over RPC, so the replication attempt failed with error 1722.
Replication
Replication errors
8333Active Directory replication failed because a directory object was not foundActive Directory replication could not complete because it expected a referenced directory object that was missing or no longer available.
8446Active Directory replication failed because it could not allocate memoryActive Directory replication could not continue because the domain controller did not have enough available memory to complete the replication task.
8304Active Directory replication failed because the object was too largeActive Directory replication could not copy an object because the object or attribute set exceeded the size limits replication can handle.
1988Active Directory replication found a lingering objectActive Directory replication was blocked by a lingering object, meaning one controller still has an object that another controller already deleted and garbage collected.