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How do I place a "catch error" in my Powershell script?

Posted on 2011-02-18
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Last Modified: 2012-05-11
Experts,

          I have a Powershell script that I need to place an "error catch" so that when the user enters the incorrect user name an error is returned "User not found" and asks the user to enter another username.

Thanks, MIssyMadi
# Ask for a username

$Username = Read-Host "Enter UserName"

# Search for the user(s)

$Users = Get-QADUser -SamAccountName $Username | Select-Object Name, DN, 
  PasswordLastSet, PasswordAge,PasswordExpires, PasswordNeverExpires, 
  UserMustChangePassword, PasswordIsExpired, PasswordStatus


# Display the user(s)

$Users

If ($Users) {

  # Ask if they wish to proceed

  $Response = Read-Host "Do you want to reset the user's password?`n[1] Yes, [2] No"

  If ($Response -eq "1") {

    # Ask for password 

    $Password1 = Read-Host "Please enter a password to use"
    $Password2 = Read-Host "Please re-enter the password to confirm"

    If ($Password1 -ne $Password2) {

      Write-Host "Passwords do not match. Aborting script." -ForegroundColor Red

    } Else {

      # Perform work

      # For each user we found earlier, set the password. Log a few things and the name of the 
      # user running this script 

      $Users | ForEach-Object { 
        Set-QADUser $_.DN -UserPassword $Password1
        Write-Host "Password reset for $($_.Name)"
      } | Select-Object SamAccountName, PasswordLastSet, @{n='SetBy';e={ $Env:Username }} |
        Out-File c:\PwdChanged.txt -Append
    }
  }
}

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Question by:missymadi
1 Comment
 
LVL 70

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Chris Dent earned 500 total points
ID: 34932279

I haven't had a chance to look at your encryption thread yet, but this one... You don't need to test for an error, it won't return one, it simply won't return any results, so we must check for that.
# Ask for a username

$Username = Read-Host "Enter UserName"

# Search for the user(s)

$Users = Get-QADUser -SamAccountName $Username | Select-Object Name, DN, 
  PasswordLastSet, PasswordAge,PasswordExpires, PasswordNeverExpires, 
  UserMustChangePassword, PasswordIsExpired, PasswordStatus


# Display the user(s)

$Users

If ($Users) {

  # Ask if they wish to proceed

  $Response = Read-Host "Do you want to reset the user's password?`n[1] Yes, [2] No"

  If ($Response -eq "1") {

    # Ask for password 

    $Password1 = Read-Host "Please enter a password to use"
    $Password2 = Read-Host "Please re-enter the password to confirm"

    If ($Password1 -ne $Password2) {

      Write-Host "Passwords do not match. Aborting script." -ForegroundColor Red

    } Else {

      # Perform work

      # For each user we found earlier, set the password. Log a few things and the name of the 
      # user running this script 

      $Users | ForEach-Object { 
        Set-QADUser $_.DN -UserPassword $Password1
        Write-Host "Password reset for $($_.Name)"
      } | Select-Object SamAccountName, PasswordLastSet, @{n='SetBy';e={ $Env:Username }} |
        Out-File c:\PwdChanged.txt -Append
    }
  }
} Else {

  Write-Host "No users found" -ForegroundColor Red

}

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Chris
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