It seems some readers have encountered the dcdiag 0x2105 replication error message. This issue occurs due to several factors. Let’s discuss this now.
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This article describes how to resolve an issue that causes Active Directory replication to fail with error 8453: Replication access denied.to:
Applies to Windows Server 2012 R2
Original KB number: 2022387
The target domain controller does not get the necessary permissions to replicate some sort of naming context/key.
The administrator who started the manual replication does not have permission to do so. Condition
This does not affect regular periodic or replication.
For periodic or signed replication when the operator of the first target domain is a read-only domain controller (RODC):
The Enterprise Read-Only Domain Controllers security company does not have permission to replicate directory changes to the calling context root (NC) for the partition. If replication fails and error 8453 is returned. Solution
Terminate any NC that controlsRead-only domain controllers try not to replicate, and which returns error 8453, grant permissions to replicate directory changes to use the read-only root domain controllers security group forest.
The read-only domain controller
childdc2.child.contoso.Ne com does not replicate the
contoso.com key and returns error 8453. To resolve this issue, follow these steps:
Open ADSIEDIT.msc on a good controller from Domain
open domain name
contoso.comto connect to NC (default context) by.properties
Open my dc=contoso,dc=com, select NC, and on the tab select Security.
Select “Add” and enter the following in the text field:
ContosoEnterprise Read-Only Domain Controllers
This group exists only in the entire forest root domain. You
Select Check Names Then, select OK.
In the Permissions for Enterprise Read-Only Domain Controllers dialog box, clear the Allow check boxes thatare installed automatically:
- Read the domain and password blocking rules
- Read other domain settings
Check the “Replicate Directory Changes” box and click OK.
If these steps don’t solve your problem, read the most important part of this article.
If this irritation occurs, you will feel one or more of the following symptoms:
DCDIAG replication test (
DCDIAG /TEST:NCSecDesc) reports that an Au error has occurred on the domain controller under test and status 8453: Replication access denied:
Start Test: Replications[check replication,
to Replication returned an error (8453):The replication lookup was denied.error
DCDIAG NCSecDesc Test (
DCDIAG /TEST:NCSecDes) reports that the website URL checker tested by DCDIAG failed the NCSecDec test and one or more permissions in the NC header are missing, i.e. .multiple directory partitions per tested domain controller DCDIAG just tested:
Start test: NCSecDescError NT does not contain AUTHORITYENTERPRISE DOMAIN CONTROLLERSReplicate directory changes <- Missing access listReplication Synchronization <- Permissions required for "Manage Replication Topology Group" <- Security group may varyReplicate directory changes in filtered set <- vacuum dependentValue PermissionsName: <- directly in your organicDC=contoso,DC=comCONTOSO ErrorDomain Controllers ErrorReplicate all directory changesPermissions for the most important naming:DC=contoso,DC=com context Error CONTOSOEnterprise Read-Only Domain Controllers may not haveReplicate directory changesNaming permissions:DC=contoso,DC=com context......................... CONTOSO-DC2 Push NCSecDesc failed
The DCDIAG MachineAccount test (
DCDIAG /TEST:MachineAccount) states that the domain controller appears to have been tested by DCDIAG failed the MachineAccount test because the machine account domain controller is usually missing from the UserAccountControl attribute or server_trust_account flags TRUSTED_FOR_DELEGATION:
Start Test: MachineAccountThe CONTOSO-DC2 account is not trusted for delegation. It can'treproduce.The CONTOSO-DC2 payment is not a DC account entry. It is impossible to reproduce it.A warning. Attribute for userAccountControl CONTOSO-DC2:0x288 = (HOMEDIR_REQUIRED | ENCRYPTED_TEXT_PASSWORD_ALLOWED | NORMAL_ACCOUNT)Typical DC definition:0x82000 implicit ( | server_trust_account TRUSTED_FOR_DELEGATION )This can affect duplication who?.................................CONTOSO-DC2 a Au not passed l Test MachineAccountDownload this software now to fix your PC and increase its security.
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