Fix broken trust using Powershell

When trying to log in to PC using a domain credential you get the following error:

“The trust relationship between this workstation and the primary domain failed” error when you log in to Windows 7

At this point I would usually re-join to the domain or run the Network Wizard, reboot, and continue on. There has to be a better way. And in-fact, there is via the Powershell command:

Reset-ComputerMachinePassword –server -credential

However, when I ran the command to reset the password I got an error stating the account could not be found on the domain controller:

PS C:\A3336> Reset-ComputerMachinePassword -server DELLR710 -credential AP\client_admin
Reset-ComputerMachinePassword : Cannot find the computer account for the local computer from the domain controller DELLR710.
At line:1 char:1
+ Reset-ComputerMachinePassword -server DELLR710 -credential AP\client_admin ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : OperationStopped: (A3336:String) [Reset-ComputerMachinePassword], InvalidOperationException
    + FullyQualifiedErrorId : CannotFindMachineAccount,Microsoft.PowerShell.Commands.ResetComputerMachinePasswordCommand

PS C:\A3336>

The fix was to create the account on the domain controller which I was able to do with Powershell on another PC that had Remote Server Administration Tools (RSAT) installed.

    PS C:\AP01-1255-915> New-ADcomputer –name "A3336" –SamAccountName "A3336" -Enabled $true
    PS C:\AP01-1255-915>

Now when the command is run on the client PC I am prompted to enter a username and password with permission to join computers to the domain and the command completes successfully.

    PS C:\A3336> Reset-ComputerMachinePassword -server DELLR710 -credential AP\client_admin
    PS C:\A3336>


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