Enterprise Manager Grid Control offers the support for monitoring a Microsoft Internet Information Server 6.0 after installing the extension plug-in which can be found here.
In addition to the earlier post on why use the Exchange Server Plugin, this is a welcome add-on to monitoring for example your Outlook Web Access clients.
With the Microsoft IIS 6.0 plugin you are able to monitor your current connections together with any problem that might have occurred with the OWA service.
Here is an impression on what to expect

