ADFS 3.0 Form Based Authentication is not working properly from internet

Hi,

We have 2 ADFS 3.0 servers load balanced by F5. F5 is behaving as a proxy as we don't have WAP for our ADFS farm. CurrentlyWindows Integrated Authentication is being set for intranet and Forms based Authentication is being set for extranet users in ADFS. Forms based authentication works fine when you access ADFS URL from Mozilla or FireFox but when you use IE you get a Windows Integrated Authentication prompt from internet. We are unable to understand and troubleshoot why user's are getting Windows Integrated Authentication from internet although we have FBA when traffic is coming through internet.Is there something i am missing in my configuration?

Any suggestion will be highly appreciated. Thanks.

Regards, Riaz Javed Butt | Consultant Microsoft Professional Services MCITP, MCITP (Exchange), MCSE: Messaging, MCITP Office 365 | msexchgeek.wordpress.com