Changes from the applicationhost.xdt file don't have an affect

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I am trying to change the order of modules in the IIS pipeline in the ApplicationHost.config file, so I have created a following file and placed it in the site directory on the server, but unfortunately nothing happened. Here are the contents of my file:

<configuration xmlns:xdt="http://schemas.microsoft.com/XML-Document-Transform">
	<system.webServer>
		<modules>
			<add name="EnvVarSetModule" lockItem="true" />
			<add name="AspNetCoreModuleV2" lockItem="true" />
			<add name="AspNetCoreModule" lockItem="true" />
			<add name="PipeStat" lockItem="true" />
			<add name="RewriteModule" />
			<add name="ARRHelper" lockItem="true" />
			<add name="DynamicIpRestrictionModule" lockItem="true" />
			<add name="IsapiModule" lockItem="true" />
			<add name="IsapiFilterModule" lockItem="true" />
			<add name="HttpLoggingModule" lockItem="true" />
			<add name="HttpCacheModule" lockItem="true" />
			<add name="DynamicCompressionModule" lockItem="true" />
			<add name="StaticCompressionModule" lockItem="true" />
			<add name="DefaultDocumentModule" lockItem="true" />
			<add name="DirectoryListingModule" lockItem="true" />
			<add name="ProtocolSupportModule" lockItem="true" />
			<add name="HttpRedirectionModule" lockItem="true" />
			<add name="ServerSideIncludeModule" lockItem="true" />
			<add name="StaticFileModule" lockItem="true" />
			<add name="AnonymousAuthenticationModule" lockItem="true" />
			<add name="IpRestrictionModule" lockItem="true" />
			<add name="RequestFilteringModule" lockItem="true" />
			<add name="CustomErrorModule" lockItem="true" />
			<add name="FailedRequestsTracingModule" lockItem="true" />
			<add name="CgiModule" lockItem="true" />
			<add name="FastCgiModule" lockItem="true" />
			<add name="ConfigurationValidationModule" lockItem="true" />
			<add name="OutputCache" type="System.Web.Caching.OutputCacheModule" preCondition="managedHandler" />
			<add name="Session" type="System.Web.SessionState.SessionStateModule" preCondition="managedHandler" />
			<add name="WindowsAuthentication" type="System.Web.Security.WindowsAuthenticationModule" preCondition="managedHandler" />
			<add name="FormsAuthentication" type="System.Web.Security.FormsAuthenticationModule" preCondition="managedHandler" />
			<add name="DefaultAuthentication" type="System.Web.Security.DefaultAuthenticationModule" preCondition="managedHandler" />
			<add name="RoleManager" type="System.Web.Security.RoleManagerModule" preCondition="managedHandler" />
			<add name="UrlAuthorization" type="System.Web.Security.UrlAuthorizationModule" preCondition="managedHandler" />
			<add name="FileAuthorization" type="System.Web.Security.FileAuthorizationModule" preCondition="managedHandler" />
			<add name="AnonymousIdentification" type="System.Web.Security.AnonymousIdentificationModule" preCondition="managedHandler" />
			<add name="Profile" type="System.Web.Profile.ProfileModule" preCondition="managedHandler" />
			<add name="UrlMappingsModule" type="System.Web.UrlMappingsModule" preCondition="managedHandler" />
			<add name="ApplicationInitializationModule" lockItem="true" />
			<add name="UrlRoutingModule-4.0" type="System.Web.Routing.UrlRoutingModule" preCondition="managedHandler,runtimeVersionv4.0" />
			<add name="ScriptModule-4.0" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" preCondition="managedHandler,runtimeVersionv4.0" />
			<add name="ServiceModel-4.0" type="System.ServiceModel.Activation.ServiceHttpModule, System.ServiceModel.Activation, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" preCondition="managedHandler,runtimeVersionv4.0" />
			<add name="iisnode" />
			<add name="ModSecurity IIS (32bits)" preCondition="bitness32" />
			<add name="ModSecurity IIS (64bits)" preCondition="bitness64" />
			<add name="ApplicationRequestRouting" />
			<add name="httpPlatformHandler" />
			<add name="ProcessMonitoringModule" lockItem="true" />
			<add name="ApplicationIdentificationModule" lockItem="true" />
			<add name="WebSocketModule" lockItem="true" />
			<add name="WebSocketMonitoringModule" lockItem="true" />
			<add name="DWASModule" lockItem="true" />
			<add name="AzureSlaModule" lockItem="true" />
		</modules>
	</system.webServer>
</configuration>

What I have tried:

I have tried to install the IISManager extension, placing the file in other directories, but to no success.

Posted 3-Mar-24 10:31am

Member 14703094

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Pete O'Hanlon · Answer 1 · 2024-03-04T05:17:00

Solution 1

So, this file is supposed to exist in %WinDir%\System32\Inetsrv\Config, and not at your site level. You can't put a local version in and have it picked up by IIS; that's not the way it works.

Posted 4-Mar-24 5:17am

Pete O'Hanlon

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Member 14703094 5-Mar-24 7:44am

The file applicationhost.config indeed does, but it's a read only file, and from the articles I have found on the internet, in order to change it you need to create an applicationhost.xdt file, which will contain the changes you need to want to make to the "original" applicationhost file:
https://www.thebestcsharpprogrammerintheworld.com/2015/01/19/making-changes-to-the-applicationhost-config-on-azure-app-service/