下面缩短的代码可以使用，但最终使用ApplicationPool标识而不是我在数组中指定的特定标识。
声明：
#App pool array positions
$Name = 0
$User = 1
$Pwdx = 2
#Application array positions
$SiteNm = 0
$PhyPath = 1
$PoolNm = 2
#App Pool Settings
$Port="80"
$HostName="*"
$Environment="local"
$Runtime="v4.0"
$Pipeline="0" #Integrated
$Identity="3" #SpecificUser
#Define the App Pools
$Pools = @(3)*2
$Pools[0] = "SomeAppPool","FooBar\SomeUser","S0meUs3rP4ssw0RD"
$Pools[1] = "AnotherAppPool","FooBar\AnotherUser","An0th3rUs3rP4ssw0RD"
执行代码：
Import-Module WebAdministration
#navigate to the app pools root
cd IIS:\AppPools\
foreach($p in $Pools)
{
$AppPoolName = $p[$Name]
$AppPoolUser = $p[$User]
$AppPoolPwd = $p[$Pwdx]
$appPool = New-Item $AppPoolName
$appPool | Set-ItemProperty -Name managedRuntimeVersion -Value $Runtime
$appPool | Set-ItemProperty -Name managedPipelineMode -Value $Pipeline
$appPool | Set-ItemProperty -Name processModel.identityType -Value $Identity
$appPool | Set-ItemProperty -Name processModel.username -Value $AppPoolUser
$appPool | Set-ItemProperty -Name processModel.password -Value $AppPoolPwd
Write-Host "$AppPoolName Application Pool Created..."
}
代替使用“ Set-ItemProperty”，直接访问并设置AppPool属性：
$appPool = New-Item $AppPoolName
$appPool.managedRuntimeVersion = $Runtime
$appPool.managedPipelineMode = $Pipeline
$appPool.processModel.identityType = $Identity
$appPool.processModel.username = $AppPoolUser
$appPool.processModel.password = $AppPoolPwd
$appPool | Set-Item
$appPool.Stop()
$appPool.Start()
编辑：做了一些测试，看来您的代码工作正常，除非它没有设置用户名。为什么？
实际参数是“ processModel.userName”（注意大写字母“ N”）。所以，看起来像
$appPool | Set-ItemProperty -Name processModel.userName -Value $AppPoolUser
区分大小写，但是
$appPool.processModel.username = $AppPoolUser
不是。爱上PowerShell。
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我来说两句