APM Login Page Customization, how to skip the 1st logon

We have 3 types of URL's :

 

• public (no authentication required) iRule disables APM (if authentication is required APM is enabled)
• with simple authentication (AD) managed by the per Session policy
• restricted (multi factor authentication) managed by the per Request policy

This last authentication method uses the AD credential passed by SSO variables.

 

The issue we have is that before getting the Challenge/Response request, we first get a page, originally needed for credentials.

 

My workaround was to transform the "LOGON" button as an "ENTER" button, with a message "Restricted Area"

 

After I validate "ENTER", I get my Challenge/Response page.

 

We would like to get rid of the first logon and go directly to the Challenge/Response page.

 

Is there a trick to bypass that page or automatically confirm the logon ?

 

I tried to remove the logon page but that does not work and triggers an error.

 

Anyone an idea ?! Regards St.