Secure Websense Personal Email Manager

Hi,

 

Our team has recently deployed Websense Email Security for filtering of external emails. There is a webpage on the appliance called "Personal Email Manager" where users can managed their SPAM lists and release held emails.

 

I would like to use F5's LTM/APM module to secure this page externally, ideally with a single sign on. I've done a bit of playing around and managed to setup a Form Based page authenticating against our AD. The problem I am facing is that F5's form is expecting a username to authenticate against where as the Websense page authenticates using email address instead.

 

Has anyone done something along these lines before? Does anyone have any good guides to point me in the right direction?

 

I am running 11.3.8

 

Thanks.