powershell problem with expired passwords

I have a problem with getting the correct password expire date form an active directory:

I need to notify users in timely fashion on expired passwords , so i found a script which worked for other customers:

https://gallery.technet.microsoft.com/Password-Expiry-Email-177c3e27

with this customer i get a few valid values back but not the user which I'm expecting (one who has to change the password in 2 days from now)

with the command net user [username] /domain

i get the values for this user:
Password last set            7/24/2015 11:17:56 AM
Password expires             9/4/2015 11:17:56 AM
Password changeable          7/24/2015 11:17:56 AM

when i run a powershell script:

Get-ADUser -filter {Enabled -eq $True -and PasswordNeverExpires -eq $False} –Properties "DisplayName", "msDS-UserPasswordExpiryTimeComputed"|Select-Object -Property "Displayname",@{Name="ExpiryDate";Expression={[datetime]::FromFileTime($_."msDS-UserPasswordExpiryTimeComputed")}}

i get the following output for the same user:
Displayname                             ExpiryDate
-----------                                      ----------
[display name user]                  1/1/1601 1:00:00 AM

so is'clear from the powershell command the paswword will not expire and the script wont sent the email to this user

I'm pretty sure i'm missing something. where comes the difference from in the net user command and the powershell script
and what can i do to solve this ?