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Active Directory Replication

Active Directory replication encountered a database error

The replication operation encountered a database error.

Active Directory replication failed because the domain controller hit a database-level problem such as corruption, index damage, lingering-object issues, or related storage faults.

8451configuration

Observed message

The replication operation encountered a database error.

Why it happens

  • The Active Directory database or an index is corrupted.
  • Underlying storage, controller, firmware, or power-loss issues damaged directory data.
  • Lingering objects or related directory-state inconsistencies are causing replication failure.

How to fix it

  1. Review the associated directory service events and Repadmin output to identify the specific database failure pattern.
  2. Check storage, controller, and firmware health on the affected domain controller.
  3. Follow the Microsoft remediation guidance for the specific underlying database or lingering-object condition.

Official reference

Active Directory Replication Error 8451

Related errors

8606Active Directory replication failed because insufficient attributes were given to create an object1908Active Directory operation failed because it could not find the domain controller for the domain8453Active Directory replication access was denied1753Active Directory replication failed because no endpoints were available from the endpoint mapper

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Active Directory replication error 8451 database error | Error Atlas