The IIS discovery module failed to perform discovery of the IIS components due to the discovery rule using an account with insufficient privileges. Until this error is corrected, components such as application pools or sites on this web server will not be discovered.
The action account of the agent or the account used in the Privileged Monitoring RunAs profile does not have sufficient privileges to perform IIS discovery.
Configure the Privileged Monitoring RunAs profile to use an account which has access to the configuration files used by IIS. Usually these files are stored in C:\Windows\System32\inetsrv\config.