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Fixing The trust relationship between this computer and the primary domain failed Error when restoring a Snapshot or Old Virtual Machine

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I had a VM snapshot/checkpoint running for several months in my test lab and after reverting the snapshot back I went to login to the machine and got the dreaded Trust relationship between this computer and the primary domain failed error message.  

So I logged in as a local admin onto that machine, opened up an Administrative PowerShell window and entered the below commands.

$cred = Get-Credential – (enter domain admin account when prompted)
Reset-ComputerMachinePassword -Credential $cred -Server ada-dc-02.adatum.com.au

Replace the server at the end with a FQDN of one of your Domain Controllers.  As I wasn’t authenticated to the domain, I needed to enter my domain admin credentials by using the Get-Credential cmdlet and then using those stored credentials to issue the Reset-ComputerMachinePassword cmdlet.

So there you have it, no more re-joining a computer to the domain.

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