What is the URL that fails? The fact you get back 404 suggests you have connected to the web server in question? Does the 404 come from the internal captive portal or from a real server on the internet?
i think this was coming from internet. we are using internal captive portal, as the authentication. After we entered the credential using Active Directory Account it shows this error. and cant access to internet
That link doesn't work for me either, can you redirect to a different link post login, such as www.extremenetworks.com - from the limited information provided it seems the server is responding ie "go.microsoft.com" but the server doesn't understand the link.