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Script repository

Automatically add a digit to the username if it is not unique

February 22, 2021 Views: 4481

The scripts can be used to automatically generate a unique username for a user by adding a digit. To use them with Adaxes, create a business rule triggered before creating a user that runs one of the scripts. For more details, see Validate/Modify User Input Using a Script.

Note: To use the scripts, you need to install Adaxes PowerShell Module on the computer, where your Adaxes service is running.

Username not limited by length

Edit Remove
PowerShell
Import-Module Adaxes
function IsUserNameUnique($username)
{
   $user = Get-AdmUser $username -erroraction silentlycontinue
   return $user -eq $Null
}

# Get the username
$username = $Context.GetModifiedPropertyValue("samAccountName")

# Check if the username is unique
if (IsUserNameUnique($username))
{
    return
}

# If the username is not unique, generate a unique one
$uniqueUsername = $Null
for ($i = 1; $True; $i++)
{
    $uniqueUsername = $username + $i;
    if (IsUserNameUnique($uniqueUsername))
    {
        break
    }
}

# Update User Logon Name (pre-Windows 2000)
$Context.SetModifiedPropertyValue("samAccountName", $uniqueUsername)

# Update User Logon Name
$upnSuffix = $Context.GetObjectDomain("%distinguishedName%")
$userLogonName = $uniqueUsername + "@" + $upnSuffix
$Context.SetModifiedPropertyValue("userPrincipalName", $userLogonName)
$Context.LogMessage("The username was changed to " + $userLogonName `
  + ".", "Information")

Username has a length limitation

Parameter:

  • $maximumLength - Specifies the maximum number of characters that a username can have.
Edit Remove
PowerShell
Import-Module Adaxes

$maximumLength = 8 # TODO: modify me

function IsUserNameUnique($username)
{
   $user = Get-AdmUser $username -erroraction silentlycontinue
   return $user -eq $Null
}

# Get the username
$username = $Context.GetModifiedPropertyValue("samAccountName")

# Check user name Length
if ($username.Length -gt $maximumLength)
{
    $username = $username.SubString(0 , $maximumLength)
}
elseif (IsUserNameUnique($username))
{
    # Username is unique
    return
}

# If the username is not unique, generate a unique one
$uniqueUsername = $username
for ($i = 1; $True; $i++)
{
    if (IsUserNameUnique($uniqueUsername))
    {
        break
    }
    
    $difference = $maximumLength - $username.Length - $i.ToString().Length
    if ($difference -lt 0)
    {
        $username = $username.Substring(0, $username.Length + $difference)
    }
   
    if ([System.String]::IsNullOrEmpty($username))
    {
        $Context.Cancel("Unable to generate a unique username, because the number length exceeds the maximum length of the username")
        return
    }

    $uniqueUsername = $username + $i;
}

# Update User Logon Name (pre-Windows 2000)
$Context.SetModifiedPropertyValue("samAccountName", $uniqueUsername)

# Update User Logon Name
$upnSuffix = $Context.GetObjectDomain("%distinguishedName%")
$userLogonName = $uniqueUsername + "@" + $upnSuffix
$Context.SetModifiedPropertyValue("userPrincipalName", $userLogonName)
$Context.LogMessage("The username was changed to " + $userLogonName `
  + ".", "Information")
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