The identity of an application pool is the name of the service account under which the application pool's worker process runs. By default, application pools operate under the Network Service user account, which has low-level user access rights. You can configure application pools to run under the Local System user account, which is an account with more user rights than the Network Service or Local Service user accounts. However, be mindful that running an application pool under an account with increased user rights presents a high security risk.
Credentials: Membership in the Administrators group on the local computer.
This feature of Internet Information Services (IIS) 6.0 is available only when IIS ...