SSL offloading breaks ECP

[Ryan Suarez]

I've got a working shib IdP behind F5 load balancers.  Web SSO and ECP 
(for Office 365) works fine.

But if I terminate SSL at the load balancers like so:
https://lists.internet2.edu/sympa/arc/shibboleth-users/2008-12/msg00351.html

Web SSO works but it breaks ECP.  I don't really understand how ECP is 
affected, still troubleshooting.  I don't see any debug logs on the IdP 
regarding ECP.  It would be greatly appreciated if someone can offer 
tips or point me in the right direction.

-Ryan