Add Active Directory Federation Services to the list of supported providers

src/OpenIddict.Client.WebIntegration/OpenIddictClientWebIntegrationProviders.xml

@@ -5,6 +5,27 @@
     https://documentation.openiddict.com/guides/contributing-a-new-web-provider.html.
   -->
 
+  <!--
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+  -->
+
+  <Provider Name="ActiveDirectoryFederationServices" DisplayName="Microsoft Active Directory Federation Services"
+            Documentation="https://learn.microsoft.com/en-us/windows-server/identity/ad-fs/overview/ad-fs-openid-connect-oauth-flows-scenarios">
+    <!--
+      Note: Active Directory Federation Services (ADFS) is a self-hosted identity provider that
+      doesn't have a generic issuer URI. As such, the complete URI must always be set in the options.
+    -->
+
+    <Environment Issuer="{issuer}" />
+
+    <Setting PropertyName="Issuer" ParameterName="issuer" Type="Uri" Required="true"
+             Description="The URI used to access the ADFS instance, including the virtual directory (e.g https://contoso.com/adfs)" />
+  </Provider>
+
   <!--
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