Set_IIS_ApplicationPool_FixedRecycleInterval.ps1

#https://www.saotn.org/iis-application-pool-recycle-on-specific-times-not-regular-time-interval/

Import-Module WebAdministration

$appPools = Get-ChildItem IIS:\apppools | where {$_.Name -match "APP1|APP2"}
$timeDiff = 0

$appPools | ForEach-Object {
   
    $pool = $("IIS:\AppPools\") + ($_.Name)
    
    #Disable Periodic Recycle
       set-ItemProperty $pool -Name Recycling.periodicRestart.time -Value 0.00:00:00 

    #Set Fixed Interval Recycle
    $time = (get-date 01:00:00).AddMinutes($timeDiff).ToString("HH:mm:ss")

    clear-ItemProperty $pool -Name Recycling.periodicRestart.schedule
       set-ItemProperty $pool -Name Recycling.periodicRestart.schedule -Value @{value=$time}
    
    #Print
    Write-Host $pool - $time

    #Increment interval
       $timeDiff+=5
    
    #Use sleep because the change of the setting triggers a recycle...
    Start-Sleep -s 30
}