How to specify application pool identity user and password from PowerShell

Question

I have been having lots of difficulty automating the setup of a Web application and configuring IIS appropriately with the Application Pool Identity. I am doing this in a Web a

Answer 1

I'm on powershell v4 which doesn't have 'ConvertFrom-SecureString', in the end I got the following to work for me:

Import-Module WebAdministration

$cred = Get-Credential -Message "Please enter username and new password to reset IIS app pool password (for app pools running as username)"

$bstr = [System.Runtime.InteropServices.Marshal]::SecureStringToBSTR($cred.Password)
$plaintext = [System.Runtime.InteropServices.Marshal]::PtrToStringAuto($bstr)

$applicationPools = Get-ChildItem IIS:\AppPools | where { $_.processModel.userName -eq 
$cred.UserName }

foreach($pool in $applicationPools)
{
    $apppool = "IIS:\AppPools\" + $pool.Name

    Set-ItemProperty $apppool -name processModel.password -Value $plaintext
}

Write-Host "Application pool passwords updated..." -ForegroundColor Magenta 
Write-Host "" 
Read-Host -Prompt "Press Enter to exit"