Powershell Invoke-Command Problem

 Import-Module ActiveDirectory
Add-PSSnapin quest.activeroles.admanagement
Add-PSSnapin Microsoft.Exchange.Management.PowerShell.E2010
do {
  do {
    write-host ""  
    write-host "X - Exit"  
    write-host "A - Ausgabe der GPO´s"  
    write-host "B - Export GPO"  
    write-host "C - Import GPO"  
    write-host "D - Server Edition Upgrade"  
    write-host "E - Change Product Key"  
    write-host "F - Set Global User Identity"  
    write-host "G - Change User Password"  
    write-host "H - Redirect an OU"  
    write-host "I - Enable Mailbox for Users in OU"  
    write-host "J - Add Mailbox for User in specified OU"  
    write-host "K - ADD OU"  
    write-host "L - ADD Group"  
    write-host "M - New Email Address Policy"  
    write-host "N - Forward Mails to SMTP Address"  
    write-host "O - Disable Forwarding to SMTP Address"  
    write-host "P - View Forwarding Status for User"  
    write-host "Q - New Distribution list"  
    write-host "R - Add Users to Distribution list from a csv file"  
    write-host "S - Command 4"  
    write-host "T - Command 4"  
    write-host "U - Command 4"  
    write-host "V - Command 4"  
    write-host "W - Command 4"  
    write-host "Y - Command 4"  
    write-host "Z - Command 4"  
    write-host ""  
    write-host -nonewline "Select command and press Enter: "  
    $choice = read-host
    write-host ""  
    $ok = @("A","B","C","D","E","F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","Y","Z","X") -contains $choice  
    if ( -not $ok) { write-host "Invalid selection" }  
  }
  until ( $ok )
  switch ( $choice ) {
     "A" {  
     Get-GPO -all
     break
         }
     "B" {  
     write-host -nonewline "GPO NAME and press Enter: "  
     $Name = read-host
     write-host -nonewline "Export Path and press Enter: "  
     $PATH = read-host
     Backup-GPO -Name $NAME -Path $PATH
     break
         }
     "C" {  
     write-host -nonewline "GPO NAME and press Enter: "      
     $Name = read-host
     write-host -nonewline "NEW GPO NAME and press Enter: "      
     $NAME1 = read-host
     write-host -nonewline "Import Path and press Enter: "  
     $PATH = read-host 
     Import-GPO -BackupGPOName $NAME -TargetName $NAME1 -CreateIfNeeded -Path $PATH
     break
         }
     "D" {  
     write-host -nonewline "Doesnt work with Domain Controllern"  
     write-host -nonewline "Edition Name: "  
     $Product = read-host
     write-host -nonewline "Product Key: "  
     $ProductKey = read-host    
     DISM /online /Set-Edition: $Product /ProductKey: $ProductKey /AcceptEula
     break
         }
     "E" {  
     write-host -nonewline "Product Key: "  
     $ProductKey = read-host    
     slmgr -ipk $ProductKey
     break
         }
     "F" {  
     write-host -nonewline "OU with Employees: "  
     $OU = read-host
     write-host -nonewline "Hosted OU of OU Employees: "  
     $OU1 = read-host
     write-host -nonewline "Next Hosted OU (leave blank if no more OU is present: "  
     $OU2 = read-host
     write-host -nonewline "Next Hosted OU (leave blank if no more OU is present: "  
     $OU3 = read-host
     write-host -nonewline "Domain Name without .local: "  
     $DOMAIN = read-host
     write-host -nonewline "Enter City: "  
     $city = read-host
     write-host -nonewline "Enter Street: "  
     $street = read-host
     write-host -nonewline "Enter Postal Code: "  
     $PostalCode = read-host
     write-host -nonewline "Enter State: "  
     $State = read-host
     write-host -nonewline "Enter Organization: "  
     $Organization = read-host
     Get-ADUser -SearchBase ou= $OU,ou= $OU1,ou= $OU2,ou= $OU3,dc= $DOMAIN,dc=local -Filter * | Set-ADUser -Identity $_ -City $city -StreetAddress $street -PostalCode $PostalCode -State $State -Company $Organization
     break
         }
     "G" {  
     write-host -nonewline "Username: "  
     $USER = read-host
     write-host -nonewline "New Password: "  
     Set-ADAccountPassword $USER -NewPassword $newpwd -Reset -PassThru | Set-ADuser -ChangePasswordAtLogon $True
     break
         }
     "H" {  
     write-host -nonewline "OU Destination: "  
     $OU = read-host
     write-host -nonewline "overall OU: "  
     $OU1 = read-host
     write-host -nonewline "Domain without .local: "  
     $DOMAIN = read-host            
     redircmp OU= $OU,OU= $OU1,DC= $DOMAIN,DC=local
     break
         }
     "I" {  
     write-host -nonewline "Enter OU like domain.local/OU/OU1/OU with Employees: "  
     $OU = read-host
     write-host -nonewline "which Database: "  
     $DATABASE = read-host            
     Get-User –OrganizationalUnit $OU | Enable-Mailbox -Database $DATABASE
     break        
         }

     "J" {  
     write-host -nonewline "Enter OU like domain.local/OU/OU1/OU with Employees: "  
     $OU = read-host
     write-host -nonewline "which Database: "  
     $DATABASE = read-host            
     Get-User –OrganizationalUnit $OU | Enable-Mailbox -Database $DATABASE
     break        
         }
     "K" {  
     write-host -nonewline "Enter OU like OU=NAME,OU=NAME,DC=DOMAIN,DC=local: "  
     $OU = read-host
     dsadd ou $OU
     break        
         }
     "L" {  
     write-host -nonewline "Enter Group like CN=NAME,OU=NAME,DC=DOMAIN,DC=local: "  
     $OU = read-host
     dsadd group $OU
     break        
         }
     "M" {  
     write-host -nonewline "New Name for Address Policy: "  
     $NAME = read-host
     write-host -nonewline "Conditional State or Province: "  
     $STATE = read-host
     write-host -nonewline "Address Policy @Domainname: "  
     $SMTP = read-host
     New-EmailAddressPolicy -Name $NAME -IncludedRecipients MailboxUsers -ConditionalStateorProvince $STATE -EnabledEmailAddressTemplates $SMTP
     break        
         }
     "N" {  
     write-host -nonewline "Username: "  
     $NAME = read-host
     write-host -nonewline "Forwarding SMTP Address: "  
     $SMTP = read-host
     set-mailbox -Identity $NAME -DeliverToMailboxAndForward $true -ForwardingSmtpAddress $SMTP
     break        
         }
     "O" {  
     write-host -nonewline "Username: "  
     $NAME = read-host
     set-mailbox -Identity $NAME -DeliverToMailboxAndForward $false -ForwardingSmtpAddress $null
     break        
         }
     "P" {  
     write-host -nonewline "Username: "  
     $NAME = read-host
     Get-Mailbox -Identity $NAME | fl *Forwarding*
     break        
         }
     "Q" {  
     write-host -nonewline "Distribution Name: "  
     $NAME = read-host
     write-host -nonewline "Sam Account Name: "  
     $SAM = read-host
     write-host -nonewline "Alias Name: "  
     $ALIAS = read-host
     new-DistributionGroup -Name $NAME -SamAccountName $SAM -Alias $ALIAS
     break        
         }
     "R" {      
     write-host -nonewline "CSV file location: "  
     $CSV = read-host
     write-host -nonewline "Distribution list: "  
     $DISTR = read-host    
     import-csv $CSV | foreach {add-distributiongroupmember -id $DISTR $_.PrimarySmtpAddress }        
     break        
         }
     }
}
until ( $choice -eq "X" )  

function resetPW {
$wks=$InputBox.text;
$User=$InputBoxUser.text;
#$pwd=$InputBoxPW.text;
$UserResult=Invoke-Command -ComputerName $wks -ScriptBlock{Set-ADAccountPassword $User -NewPassword $newpwd -Reset -PassThru | Set-ADuser -ChangePasswordAtLogon $True}
                 } #end

Set-ADAccountPassword user1 -NewPassword $newpwd -Reset -PassThru | Set-ADuser -ChangePasswordAtLogon $True

[void] [System.Reflection.Assembly]::LoadWithPartialName("System.Drawing")   
[void] [System.Reflection.Assembly]::LoadWithPartialName("System.Windows.Forms")  #loading the necessary .net libraries (using void to suppress output)  

#Window Options
$Form = New-Object System.Windows.Forms.Form    #creating the form (this will be the "primary" window)  
$Form.Size = New-Object System.Drawing.Size(1024,768)  #the size in px of the window length, height
Add-Type -AssemblyName System.Windows.Forms
$Image = [system.drawing.image]::FromFile("$($Env:Public)\water.jpg")  
$Form.BackgroundImage = $Image
$Form.BackgroundImageLayout = "Stretch" # None, Tile, Center, Stretch, Zoom  
$Form.StartPosition = "CenterScreen" #loads the window in the center of the screen  
$Form.FormBorderStyle = [System.Windows.Forms.FormBorderStyle]::FixedToolWindow #modifies the window border
$Form.Text = "Powershell GUI Utility" #window description  


#Funktion PING
function pingInfo {
$wks=$InputBox.text; #takes the text from the input box into the variable $wks
$pingResult=ping $wks | fl | out-string;
$outputBox.text=$pingResult #send the ping results to the output box
                     } #end

#Funktion NSlookup
function nsLookup {
$wks=$InputBox.text; #takes the text from the input box into the variable $wks
$lookupResult=[System.Net.Dns]::GetHostAddresses($wks) | fl | out-string;
$outputBox.text=$lookupResult #send the nslookup results to the output box
                     } #end 

#Funktion GPO
function GPO {
$wks=$InputBox.text; #takes the text from the input box into the variable $wks
$GPOResult=Invoke-Command -ComputerName $wks -ScriptBlock { Get-GPO -all } | fl | out-string; 
$outputBox.text=$GPOResult #send the results to the output box
              } #end

#Funktion Reset Password
function resetPW {
$wks=$InputBox.text;
$User=$InputBoxUser.text;
#$pwd=$InputBoxPW.text;
$UserResult=Invoke-Command -ComputerName $wks -ScriptBlock{Set-ADAccountPassword $User -NewPassword $newpwd -Reset -PassThru | Set-ADuser -ChangePasswordAtLogon $True}
                 } #end

#Funktion Ad User
function adUser {
$wks=$InputBox.text; #takes the text from the input box into the variable $wks
$UserResult=Invoke-Command -ComputerName $wks -ScriptBlock { Get-ADUser -Filter *} | fl | out-string; #populate the var with the value you selected
$outputBox.text=$UserResult #send the results to the output box
                } #end procInfo 

#Funktion SMTP Forwarding Status
function smtpFWstats {
$Name=$InputboxUser.text;
$wks=$InputBox.text; #takes the text from the input box into the variable $wks
$smtpFWstatus=Get-Mailbox -Resultsize Unlimited | Where {$_.ForwardingAddress -ne $null} | Select Name, @{Expression={$_.ForwardingAddress};Label="Forwarded to"}, @{Expression={$_.DeliverToMailboxAndForward};Label="Mailbox & Forward"} | fl | out-string; #populate the var with the value you selected  
$outputBox.text=$smtpFWstatus #send the results to the output box
                } #end procInfo    
           

#Start Textfields
#Input
$InputBox = New-Object System.Windows.Forms.TextBox #creating the text box
$InputBox.Location = New-Object System.Drawing.Size(10,120) #location of the text box (px) in relation to the primary window's edges (length, height)  
$InputBox.Size = New-Object System.Drawing.Size(150,20) #the size in px of the text box (length, height)
$InputBox.Text = "Computername"  
$Form.Controls.Add($InputBox) #activating the text box inside the primary window

#Input Username
$InputBoxUser = New-Object System.Windows.Forms.TextBox #creating the text box
$InputBoxUser.Location = New-Object System.Drawing.Size(165,120) #location of the text box (px) in relation to the primary window's edges (length, height)  
$InputBoxUser.Size = New-Object System.Drawing.Size(150,20) #the size in px of the text box (length, height)
$InputBoxUser.Text = "User Logon Name"  
$Form.Controls.Add($InputBoxUser) #activating the text box inside the primary window

#Input Password
#$InputBoxPW = New-Object System.Windows.Forms.TextBox #creating the text box
#$InputBoxPW.Location = New-Object System.Drawing.Size(320,120) #location of the text box (px) in relation to the primary window's edges (length, height)  
#$InputBoxPW.Size = New-Object System.Drawing.Size(150,20) #the size in px of the text box (length, height)
#$InputBoxPW.UseSystemPasswordChar = $True
#$InputBoxPW.Text = "Password"  
#$Form.Controls.Add($InputBoxPW) #activating the text box inside the primary window

#Output
$outputBox = New-Object System.Windows.Forms.TextBox #creating the text box
$outputBox.Location = New-Object System.Drawing.Size(10,150) #location of the text box (px) in relation to the primary window's edges (length, height)  
$outputBox.Size = New-Object System.Drawing.Size(1000,500) #the size in px of the text box (length, height)
$outputBox.MultiLine = $True #declaring the text box as multi-line
$outputBox.ScrollBars = "Vertical" #adding scroll bars if required  
$outputBox.Font = New-Object System.Drawing.Font("Verdana",8,[System.Drawing.FontStyle]::Italic) #Textbox Font  
$Form.Controls.Add($outputBox) #activating the text box inside the primary window
#End Textfields

#Ping Buttons
$Button = New-Object System.Windows.Forms.Button #create the button
$Button.Location = New-Object System.Drawing.Size(20,35) #location of the button (px) in relation to the primary window's edges (length, height)  
$Button.Size = New-Object System.Drawing.Size(100,23) #the size in px of the button (length, height)
$Button.Text = "Ping" #labeling the button  
$Button.Cursor = [System.Windows.Forms.Cursors]::Hand
$Button.BackColor = [System.Drawing.Color]::LightGreen
$Button.Font = New-Object System.Drawing.Font ("Verdana",10, [System.Drawing.FontStyle]::Regular)  
$Button.Add_Click({}) #the action triggered by the button
$Form.Controls.Add($Button) #activating the button inside the primary window
$Button.Add_Click({pingInfo})

#NSlookup Buttons
$Button = New-Object System.Windows.Forms.Button #create the button
$Button.Location = New-Object System.Drawing.Size(20,60) #location of the button (px) in relation to the primary window's edges (length, height)  
$Button.Size = New-Object System.Drawing.Size(100,23) #the size in px of the button (length, height)
$Button.Text = "NS Lookup" #labeling the button  
$Button.Cursor = [System.Windows.Forms.Cursors]::Hand
$Button.BackColor = [System.Drawing.Color]::LightGreen
$Button.Font = New-Object System.Drawing.Font ("Verdana",10, [System.Drawing.FontStyle]::Regular)  
$Button.Add_Click({}) #the action triggered by the button
$Form.Controls.Add($Button) #activating the button inside the primary window
$Button.Add_Click({nsLookup})

#Get GPO Button
$Button = New-Object System.Windows.Forms.Button #create the button
$Button.Location = New-Object System.Drawing.Size(20,10) #location of the button (px) in relation to the primary window's edges (length, height)  
$Button.Size = New-Object System.Drawing.Size(100,23) #the size in px of the button (length, height)
$Button.Text = "Get GPO´s" #labeling the button  
$Button.Cursor = [System.Windows.Forms.Cursors]::Hand
$Button.BackColor = [System.Drawing.Color]::LightGreen
$Button.Font = New-Object System.Drawing.Font("Verdana",10,[System.Drawing.FontStyle]::Regular)  
$Button.Add_Click({}) #the action triggered by the button
$Form.Controls.Add($Button) #activating the button inside the primary window
$Button.Add_Click({GPO})

#Set New User Password
$Button = New-Object System.Windows.Forms.Button #create the button
$Button.Location = New-Object System.Drawing.Size(120,10) #location of the button (px) in relation to the primary window's edges (length, height)  
$Button.Size = New-Object System.Drawing.Size(130,23) #the size in px of the button (length, height)
$Button.Text = "Reset Password" #labeling the button  
$Button.Cursor = [System.Windows.Forms.Cursors]::Hand
$Button.BackColor = [System.Drawing.Color]::LightGreen
$Button.Font = New-Object System.Drawing.Font("Verdana",10,[System.Drawing.FontStyle]::Regular)  
$Button.Add_Click({}) #the action triggered by the button
$Form.Controls.Add($Button) #activating the button inside the primary window
$Button.Add_Click({resetPW})

#Get AD User Button
$Button = New-Object System.Windows.Forms.Button #create the button
$Button.Location = New-Object System.Drawing.Size(120,35) #location of the button (px) in relation to the primary window's edges (length, height)  
$Button.Size = New-Object System.Drawing.Size(130,23) #the size in px of the button (length, height)
$Button.Text = "Get All AD User" #labeling the button  
$Button.Cursor = [System.Windows.Forms.Cursors]::Hand
$Button.BackColor = [System.Drawing.Color]::LightGreen
$Button.Font = New-Object System.Drawing.Font("Verdana",10,[System.Drawing.FontStyle]::Regular)  
$Button.Add_Click({}) #the action triggered by the button
$Form.Controls.Add($Button) #activating the button inside the primary window
$Button.Add_Click({adUser})

#SMTP Forward Status
$Button = New-Object System.Windows.Forms.Button #create the button
$Button.Location = New-Object System.Drawing.Size(400,10) #location of the button (px) in relation to the primary window's edges (length, height)  
$Button.Size = New-Object System.Drawing.Size(130,23) #the size in px of the button (length, height)
$Button.Text = "SMTP FW Status" #labeling the button  
$Button.Cursor = [System.Windows.Forms.Cursors]::Hand
$Button.BackColor = [System.Drawing.Color]::LightBlue
$Button.Font = New-Object System.Drawing.Font("Verdana",10,[System.Drawing.FontStyle]::Regular)  
$Button.Add_Click({}) #the action triggered by the button
$Form.Controls.Add($Button) #activating the button inside the primary window
$Button.Add_Click({smtpFWstats})

#Cancel Buttons
$ExitButton = New-Object System.Windows.Forms.Button #create the button
$ExitButton.Location = New-Object System.Drawing.Size(900,710) #location of the button (px) in relation to the primary window's edges (length, height)  
$ExitButton.Size = New-Object System.Drawing.Size(100,23) #the size in px of the button (length, height)
$ExitButton.Text = "Exit" #labeling the button  
$ExitButton.Add_Click({}) #the action triggered by the button
$Form.Controls.Add($ExitButton) #activating the button inside the primary window
$ExitButton.Add_Click({$Form.Close()})



#activate
[void] $Form.ShowDialog()
[void] $Form.Add_Shown({$Form.Activate()})