PowerShell - Password Generator - How to always include number in string?

Question

I have the following PowerShell script that creates a random string of 15 digits, for use as an Active Directory password.

The trouble is, this works great most of t

Answer 1

Another solution:

function New-Password() {
    param(
        [int] $Length = 10,
        [bool] $Upper = $true,
        [bool] $Lower = $true,
        [bool] $Numeric = $true,
        [string] $Special
    )

    $upperChars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
    $lowerChars = "abcdefghijklmnopqrstuvwxyz"
    $numericChars = "0123456789"

    $all = ""
    if ($Upper) { $all = "$all$upperChars" }
    if ($Lower) { $all = "$all$lowerChars" }
    if ($Numeric) { $all = "$all$numericChars" }
    if ($Special -and ($special.Length -gt 0)) { $all = "$all$Special" }

    $password = ""
    for ($i = 0; $i -lt $Length; $i++) {
        Write-Host "password: [$password]"
        $password = $password + $all[$(Get-Random -Minimum 0 -Maximum $all.Length)]
    }

    $valid = $true
    if ($Upper -and ($password.IndexOfAny($upperChars.ToCharArray()) -eq -1)) { $valid = $false }
    if ($Lower -and ($password.IndexOfAny($lowerChars.ToCharArray()) -eq -1)) { $valid = $false }
    if ($Numeric -and ($password.IndexOfAny($numericChars.ToCharArray()) -eq -1)) { $valid = $false }
    if ($Special -and $Special.Length -gt 1 -and ($password.IndexOfAny($Special.ToCharArray()) -eq -1)) { $valid = $false }

    if (-not $valid) {
        $password = New-Password `
            -Length $Length `
            -Upper $Upper `
            -Lower $Lower `
            -Numeric $Numeric `
            -Special $Special
    }

    return $password
}

Flexible enough to set length, turn on/of upper, lower, and numeric, and set the list of specials.