sergeia:Zdenek, you could use IIS WMI provider locally without any limitations. If you could use Powershell, you could use it through Powershell. IIS namespace in WMI is "WebAdministration". I am not a big expert in v1 WMI support for Powershell, I know it is pretty limited compared to v2 additions. You probably could use get-wmiobject to access your application pool, set the property, then use set-wmiobject to save changes back.
Reply to an Existing Message : The Official Microsoft IIS Site
--Sergei
And before you go looking for set-wmiobject in PowerShell v1... Don't: there is no such cmdlet. You typically do this:
$wmi=get-wmiobject
#change your WMI object
$wmi.put()
Now, I tried that with this particular setting via WMI, and it didn't work.
See about "put()" and v2 WMI features here:
http://www.microsoft.com/technet/scriptcenter/topics/winpsh/wmiin2.mspx