Author: Tobias Zimmergren Url: http://www.sharepointblogs.com/zimmer In this very short and straight-on post I'll just mention how you can configure your SharePoint installation to enable support for ASP.NET AJAX 1.0 since a lot of people have been asking me about it. Before we make any changes in the web.config we need the following: A backup of the web.config file (important, because if something goes wrong you might need to revert to the old one) SharePoint (WSS 3.0 or MOSS 2007) ASP.NET 2.0 AJAX 1.0 Extensions Be in the mood for some copy/pasting the following 5 minutes Copy/Paste time Locate your default web.config file (usually here: " C:\Inetpub\wwwroot\wss\VirtualDirectories\80\web.config "). Edit the webc.config file according to this scenario: Locate the <configSection> element and add the following code inside it: <sectionGroup name="system.web.extensions" type="System.Web.Configuration.SystemWebExtensionsSectionGroup, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral PublicKeyToken=31bf3856ad364e35"> <sectionGroup name="scripting" type="System.Web.Configuration.ScriptingSectionGroup, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"> <section name="scriptResourceHandler" type="System.Web.Configuration.ScriptingScriptResourceHandlerSection, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"...