IUSR vs Application Pool Identity – Why use either?

(pasted from my email clippings. I’m on holiday right now, catching up on paperwork!) The TLDR version is: using AppPoolIdentity as both the App Pool Account and Anonymous user account lets you have multiple isolated anonymous websites on one box. IIS 7.x (as of Win2008 R2 and Windows 2008 SP2) supports a new Application Pool account type, called an…

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