Chrome and NTLM authentication

There is an IIS web server in my company network. I did use Chrome on my Windows machine to access that web site without providing my credentials. However, after I did some change some where, it has been asking me the user name and password since then.

Finally I figured out why. Chrome uses Windows "Internet options" for NTLM authentication. If you place the web site in "Trusted sites" and Chrome won't try NTLM authentication. Only the web site in "Local Intranet", Chrome will use NTLM authentication and you can access that site without credentials.