# Command-line method
net user usernamehere newpasswordhere

# Powershell Method 1 - via ActiveDirectory module
$username="USERNAMEHERE"
$newPassword="NEWPASSWORDHERE"
$encryptedPass= ConvertTo-SecureString $newPassword -AsPlainText -Force 
Set-ADAccountPassword -Identity $username -NewPassword $encryptedPass -Reset

# Powershell method 2 - via ASDI
$userid = [ADSI]"LDAP://CN=USERNAME,OU=Users,DC=DOMAIN,DC=Local"
$userid.psbase.invoke("SetPassword",'NEWPASSWORDHERE')
$userid.psbase.CommitChanges()