How to rename application pool that already has application assigned to it?

Question

I have an Application pool that has a lot of applications been assigned to it, it won't let me rename.

Beside delete and creating a new application pool, is there anyway to get a new name for my application pool? I don't want to go and reassign every application in it.

Answer 1

Assign applications to another pool, rename the one you wanted renamed. Re-assign applications back to your pool.

IIS doesn't support other options

Answer 2

This was the simplest way that I could work it out, although I can't believe this isn't easier.

Import-Module WebAdministration

$oldName = "OldAppPool";
$newName = "NewAppPool";

if(-not (Test-Path IIS:\AppPools\TempPool)){
    New-WebAppPool TempPool
}
$tempAppPool = Get-Item IIS:\AppPools\TempPool

foreach($site in Get-ChildItem IIS:\Sites){
    $apps = $site | Get-ChildItem | Where-Object { $_.ApplicationPool -eq $oldName }

    foreach($app in $apps){
        $path = ("IIS:\Sites\{0}\{1}" -f $site.name, $app.name)
        $path
        Set-ItemProperty $path applicationPool TempPool
    }
}

Set-ItemProperty "IIS:\AppPools\$oldName" -Name name -Value $newName

foreach($site in Get-ChildItem IIS:\Sites){
    $apps = $site | Get-ChildItem | Where-Object { $_.ApplicationPool -eq "TempPool" }

    foreach($app in $apps){
        $path = ("IIS:\Sites\{0}\{1}" -f $site.name, $app.name)
        $path
        Set-ItemProperty $path applicationPool $newName
    }
}

Remove-WebAppPool TempPool