Roy,Check this article and verify that integrated is the second choice in the web.config. I think it should fix your problem.http://social.technet.microsoft.com/wiki/contents/articles/1600.aspx

Christopher,You are right the only way I have found to have Chrome/Firefox to work with a login (not automatic) is to have the Extented protection off on IIS 7.0/7.5. The browser is supposed to support Kerberos (https://developer.mozilla.org/En/Integ...

Here is the current configuration we use for meetings/connect.Meetings : AuthSignature and Token Encryption  is enabledConnect : Only AuthSignature, Token Encryption is currently broken. The desktop client fails to log if enabled.SSO is enabled for b...