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I have deployed a web application as usual, but on already installed and running Windows Server 2008 R2 with IIS 7.5.

On all machines until now the application works fine, but here an entire <system.web> section from my web.config is not used at all. We use it to specify some settings, like sessionState cookieless="true", enable Role Manager etc (debug mode is also disabled if I try to look around).

I have also looked in applicationHost.config on the machine, but there is no mention of overrideMode="Deny" for this section.

It seems to me that something is disabling my system.web section, but it's a fresh installation of IIS. Is it possible that there is some kind of company-wide policy coming from somewhere, but I really have no idea on what to try next.

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Might seem like a basic question, but is ASP.NET installed? Do basic ASP.NET pages work, what you are describing doesn't seem like an IIS issue as much as configuration.

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