function getPasswordExpiryDateforUser($user){
    $result = get-aduser $user -Server "other.domain.server:636" –Properties "DisplayName", "msDS-UserPasswordExpiryTimeComputed" | Select-Object -Property "Displayname",@{Name="ExpiryDate";Expression={[datetime]::FromFileTime($_."msDS-UserPasswordExpiryTimeComputed")}}
    return $result
}

getPasswordExpiryDateforUser("myUserName")

get-aduser : Unable to contact the server. This may be because this server does not exist, it is currently down, or it does not have the Active Directory Web Services running.
At C:testscheckUserPasswordExpiryDate.ps1:2 char:15
+ ...   $result = get-aduser $user -Server "other.domain.server: ...
+                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : ResourceUnavailable: (myUserName:ADUser) [Get-ADUser], ADServerDownException
    + FullyQualifiedErrorId : ActiveDirectoryServer:0,Microsoft.ActiveDirectory.Management.Commands.GetADUse