How to specify application pool identity user and password from PowerShell
You would do this as follows: Import-Module WebAdministration Set-ItemProperty IIS:\AppPools\app-pool-name -name processModel -value @{userName=”user_name”;password=”password”;identitytype=3} See this document here for an explanation, and a reference of the indentity type numeric for the user type you will run the app pool under: http://www.iis.net/configreference/system.applicationhost/applicationpools/add/processmodel