HCL Sametime Forum : [Solved] SPNEGO Fallback not working

Proxy server 8.5.2IFR1 is installed on Windows Server 2008 R2.

SPNEGO is configured and working. But clients that are not spnego enabled does not get a proper login window. Just "SPNEGO authentication is not supported on this client. " in FireFox. And Internet Explorer gets a Windows login popup but it does not seem to be correct since it is a Windows Domain login which always fail and ends up with "Your browser configuration is correct, but you have not logged into a supported Microsoft(R) Windows(R) Domain. Please login to the application using the normal login page. "

This also means that Sametime app for Android cannot login.

In SPNEGO config in was I have created SPNEGO filter for the site that I have enabled.
chat.customer.se with domain CUSTOMER.SE
And "Trim Kerberos realm from principal name" is checked.

My question is which authentication URL can I use so that the user gets a proper authentication URL for entering Sametime Proxy 1) Using a Web browser 2) Using a moble phone ?

[Update]
I removed the SPNEGO config and re-did everything SPNEGO. The popup window asking for authentication now works.