Resetting lost ESXi password

http://www.top-password.com/knowledge/reset-esxi-root-password.html

Works on ESXi 6.0

If you have access to vCenter..



# Just so it contains one or more VMHost objects.
# To reset all ESXi host passwords use
# $vmhosts = Get-VMHost

Connect-VICenter -Server 

$NewCredential = Get-Credential -UserName "root" -Message "Enter an existing ESXi username (not vCenter), and what you want their password to be reset to."

Foreach ($vmhost in $vmhosts) {
    $esxcli = get-esxcli -vmhost $vmhost -v2 #Gain access to ESXCLI on the host.
    $esxcliargs = $esxcli.system.account.set.CreateArgs() #Get Parameter list (Arguments)
    $esxcliargs.id = $NewCredential.UserName #Specify the user to reset
    $esxcliargs.password = $NewCredential.GetNetworkCredential().Password #Specify the new password
    $esxcliargs.passwordconfirmation = $NewCredential.GetNetworkCredential().Password
    Write-Host ("Resetting password for: " + $vmhost) #Debug line so admin can see what's happening.
    $esxcli.system.account.set.Invoke($esxcliargs) #Run command, if returns "true" it was successful.
}