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The error means Windows cannot authenticate the computer’s secure channel to Active Directory. In most cases, the machine-account password stored on the PC no longer matches the copy held by a domain controller. Sign in with a local administrator, verify DNS and domain-controller connectivity, test the channel with Test-ComputerSecureChannel, and repair or reset the machine password. If the account is missing, corrupted, or replication is involved, reset the computer account or rejoin the PC to the domain.
What the trusted-relationship error means
Windows domain membership depends on a secure channel between the workstation and a domain controller. During normal domain authentication, the computer proves its identity with a machine-account password that is maintained in both places. The exact Windows message is: “The trust relationship between this workstation and the primary domain failed.”
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A failure does not automatically mean that a user typed the wrong password or that the workstation is infected. It indicates that the computer could not complete domain authentication. Microsoft identifies an unsynchronized machine password as the usual cause. A deleted or corrupted computer account in Active Directory can produce the same result. In an Azure virtual-machine scenario, the equivalent problem is that the secret on the VM differs from the secret on the domain controller.
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What you may see
- A domain user cannot sign in, while a local account still works.
- A previously cached domain sign-in may work when the computer is disconnected, but a new domain authentication fails.
- Windows may record Netlogon Event 3210.
- Applications or services that use the computer’s domain identity may lose access to network resources.
The message is about the workstation’s computer account, not just one user profile. Repairing the secure channel normally preserves the user’s data, but changing domain membership can affect profiles and policies, so use rejoining as a fallback rather than the first action.
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Prepare before changing the domain relationship
Use a local administrator session
Have a local administrator account and its password ready before you begin. If domain sign-in is unavailable, choose Other user at the sign-in screen and enter the local account in a form such as . ackslash backslashAdministrator or COMPUTERNAME backslash backslashLocalAdmin, according to your organization’s naming. A domain account that is allowed to reset the computer account is also required for the repair commands.
Record the information you will need
- The Active Directory domain name, for example, the name shown in your organization’s sign-in format.
- At least one reachable domain controller name.
- A domain credential authorized to reset the workstation’s computer account.
- The workstation name, which you can view in Settings > System > About or with the
hostnamecommand.
Do not start a domain-unjoin operation until you know the local administrator password. If the computer is managed remotely, arrange an out-of-band or console connection in case a restart leaves the network adapter or VPN unavailable.
Diagnose the failure before repairing it
1. Confirm that the computer can reach a domain controller
Connect the PC to the organization’s network. A wired connection is useful for a first test because it removes Wi-Fi roaming and captive-portal variables. If the machine is remote, connect the company VPN before testing; the VPN must provide access to a domain controller, not merely internet access.
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2. Test the secure channel
Open Windows PowerShell as administrator and run:
Test-ComputerSecureChannelThe cmdlet returns True when the secure channel is working and False when it is broken.
| Result or finding | What it means | Next action |
|---|---|---|
False |
The workstation and domain disagree about the secure channel, or the channel cannot be reached. | Verify DNS and connectivity, then run the in-place repair. |
True |
The secure channel is not the immediate fault. | Investigate DNS, routing, authentication, account permissions, time or policy issues, and the specific sign-in error instead of repeatedly resetting the machine password. |
| The command cannot contact a domain controller | The test cannot make a valid determination because the required network path is unavailable. | Resolve VPN, routing, firewall or DNS problems first. |
A successful test does not prove that every domain service is healthy; it only says that this particular computer-to-domain secure channel responded successfully at the time of the test.
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Repair the channel with PowerShell
Use the built-in repair operation
In the same elevated PowerShell window, run the documented repair command:
Test-ComputerSecureChannel -Repair -Credential (Get-Credential)A credential prompt appears. Enter a domain account permitted to reset the computer account. The command attempts to synchronize the machine password without removing the computer from the domain. Run the diagnostic command again afterward:
Test-ComputerSecureChannelA True result confirms that the secure channel now responds. Restart Windows and try the domain sign-in again. If the command returns an error, capture the complete text; it usually distinguishes a credential, connectivity or account problem.
Reset the machine password explicitly
If the repair switch does not restore the relationship, reset the machine password directly:
$credential = Get-Credential
Reset-ComputerMachinePassword -Credential $credential
Restart-Computer -ForceThe restart is part of the procedure. After Windows comes back, sign in with the domain account and, if necessary, run Test-ComputerSecureChannel once more from an elevated PowerShell window. A reset can fail when the named credential lacks permission, when DNS points to the wrong servers, or when the computer account in Active Directory is absent or damaged.
Repair from an elevated Command Prompt with Netdom
Netdom provides an alternative when you prefer Command Prompt or when PowerShell is unavailable. Open Command Prompt as administrator and substitute your actual names.
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Verify the relationship
netdom verify ComputerName /domain:YourDomainNameThis checks the workstation against the specified domain. Replace ComputerName with the workstation’s name and YourDomainName with the Active Directory domain.
Reset the workstation password against a domain controller
netdom resetpwd /server:DomainControllerName /userd:DomainUsername /passwordd:*The asterisk causes Netdom to prompt for the password rather than exposing it in the command line. Use a domain controller that the workstation can reach. Restart the computer after the reset and retry domain sign-in.
Reset the secure relationship for the domain
netdom reset /domain:YourDomainName /userd:DomainUsername /passwordd:*Again, supply credentials at the prompt and restart afterward. Keep the command output and any error text if the operation fails; it can show whether the issue is authentication, name resolution or access to the domain controller.
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Use Nltest when the two password copies differ
Microsoft documents the following command for a machine-password mismatch between the workstation and its domain controller:
nltest /sc_change_pwd:DomainNameReplace DomainName with the Active Directory domain. Restart Windows after the command completes and test the domain sign-in. Nltest.exe is available through Remote Server Administration Tools and Windows support tools; availability depends on what is installed on the workstation.
If password repair fails
Resolve DNS, routing and firewall problems first
Do not keep repeating reset commands while the computer cannot reach a domain controller. Confirm that the active network adapter uses the organization’s DNS servers, that the domain name resolves to the expected infrastructure, and that routing permits traffic to a domain controller. Review host and network firewalls for blocked Active Directory ports. Reconnect the VPN or move to the corporate network, then rerun Test-ComputerSecureChannel and the repair command.
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Consider Active Directory replication
In a multi-controller environment, one domain controller may hold a newer machine password than another. A workstation can therefore appear healthy when tested against one controller and fail against another. Microsoft’s broken-trust guidance distinguishes cases where Active Directory has the newer password from cases where the client has the newer password. If you suspect replication, collect Netlogon and directory-service events, identify which domain controller handled the failed authentication, and have an Active Directory administrator review replication status before deleting or recreating accounts.
Check whether the computer account was deleted or corrupted
Search Active Directory Users and Computers, or ask an administrator to do so, for the workstation’s computer account in the expected organizational unit. A deleted account cannot be repaired solely from the workstation. A disabled, moved or corrupted account may also require administrative correction. Avoid creating a second account with a similar name until the original object and replication state are understood.
Use the rejoin procedure when the channel cannot be repaired in place
If network access is healthy, credentials are valid, and password-reset commands still fail, remove and rejoin the computer to the domain. This is the documented fallback for standard domain members and for affected Azure VMs.
- Sign in with a local administrator account and ensure you know its password.
- Open the System Properties dialog by pressing
Windows key + R, enteringsysdm.cpl, and pressing Enter. - On the Computer Name tab, select Change. Temporarily select Workgroup, enter a workgroup name, and confirm with an account authorized to change membership.
- Restart when Windows requests it. This leaves the domain; domain users may not be able to authenticate until the rejoin is complete.
- Open
sysdm.cplagain, select Change, choose Domain, enter the correct domain name, and provide domain credentials with permission to join computers. - Restart after Windows confirms the join. Connect to the organization’s network or VPN before the restart if required for policy and authentication.
- Sign in with a domain account, allow policy processing to complete, and verify access to a known domain resource.
Before leaving the domain, back up important local data and note any encryption or management requirements. A rejoin can create a new security identity for the computer and may require administrators to restore the computer account’s organizational-unit placement, group memberships, delegated permissions or management enrollment. Existing user profiles normally remain on disk, but Windows may associate a newly signed-in domain account with a new profile; an administrator can map or migrate data when necessary.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Azure VM-specific considerations
For an Azure virtual machine joined to a domain, the underlying issue can be a different machine secret on the VM and the domain controller. Start with the same sequence: obtain a local administrator session, establish network and DNS access to a domain controller, test the secure channel, and attempt password repair. If the VM cannot reach the domain or the computer account is no longer valid, use the domain rejoin process after coordinating with the administrators who manage the VM and Active Directory.
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| Situation | Preferred path | Why |
|---|---|---|
You can sign in locally, DNS works, and the test returns False. |
Test-ComputerSecureChannel -Repair, followed by a retest and restart. |
It repairs the channel without changing domain membership. |
| The repair switch fails but the domain controller is reachable. | Reset-ComputerMachinePassword, Netdom, or Nltest. |
These perform an explicit machine-password reset using authorized credentials. |
| The workstation cannot resolve or reach a domain controller. | Fix DNS, VPN, routing or firewall access first. | Password commands cannot succeed without the required domain path. |
| The computer account is deleted, disabled, corrupted or affected by replication. | Have an Active Directory administrator correct the account or replication state. | Local commands cannot recreate a valid directory object safely in every case. |
| Connectivity and account repairs fail repeatedly. | Remove the PC to a workgroup, restart, and join it to the domain again. | Rejoining creates a fresh secure relationship, but has greater administrative impact. |
Test-ComputerSecureChannel returns True. |
Stop secure-channel resets and investigate the separate sign-in or policy fault. | The channel is not the immediate cause shown by that test. |
Validate the result after recovery
- Run
Test-ComputerSecureChannelfrom elevated PowerShell and confirmTrue. - Restart once after a successful password reset or domain rejoin.
- Sign in with a domain account while connected to the organization’s network.
- Open a known domain resource that previously failed, such as a managed share or service.
- Check Event Viewer for new Netlogon errors; Event 3210 should not continue appearing for the same incident.
- Confirm that Group Policy and management tools can communicate with the workstation.
Common mistakes to avoid
- Using a domain account when domain authentication is broken: perform the repair from a local administrator session.
- Resetting against an unreachable controller: verify DNS and routing before entering credentials.
- Ignoring the command result: a
Truetest means the secure channel is not the immediate fault; pursue another diagnosis. - Deleting the computer account too early: replication may leave another controller with the newer password, and deletion can increase recovery work.
- Leaving the domain without local credentials: you can lock yourself out after the restart.
- Assuming a rejoin fixes every sign-in problem: profile, policy, time, DNS and permissions issues can remain after membership is restored.
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Bottom line
Start with local administrator access and a working path to a domain controller. A False result from Test-ComputerSecureChannel usually points to a machine-password mismatch, so repair it in place with PowerShell, Netdom or Nltest and restart. If DNS, firewall, replication or the computer account itself is at fault, correct that underlying issue; rejoin the domain only when in-place repair cannot restore the secure channel.
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