ad-password-reset.ps1

function Set-PasswordRemotely {
    [CmdletBinding()]
    param(
        [Parameter(Mandatory = $true)][string] $UserName,
        [Parameter(Mandatory = $true)][string] $OldPassword,
        [Parameter(Mandatory = $true)][string] $NewPassword,
        [Parameter(Mandatory = $true)][alias('DC', 'Server', 'ComputerName')][string] $DomainController
    )
    $DllImport = @'
[DllImport("netapi32.dll", CharSet = CharSet.Unicode)]
public static extern bool NetUserChangePassword(string domain, string username, string oldpassword, string newpassword);
'@
    $NetApi32 = Add-Type -MemberDefinition $DllImport -Name 'NetApi32' -Namespace 'Win32' -PassThru
    if ($result = $NetApi32::NetUserChangePassword($DomainController, $UserName, $OldPassword, $NewPassword)) {
        Write-Output -InputObject 'Password change failed. Please try again.'
    } else {
        Write-Output -InputObject 'Password change succeeded.'
    }
}

Set-PasswordRemotely

Opps! you are locked out of the domain by an expired password.
Use this script to reset your password. The client you use doesn't need to be joined to the domain, or logged on via a domain user.

You simply need to know your former password.