SSL Offloading and proxying to a different site.

A post on experts-exchange.com says "A big warning about SSL offloading, and that is proxy to a different site *will not work* for Exchange ActiveSync or OWA."

http://www.experts-exchange.com/Networking/Protocols/SSL/Q_28486166.html

I'm unable to find any other information to corroborate that statement. Can someone point me to MS documentation that would confirm or deny that proxying to a different site will not work with SSL Offloading enabled?

Thanks

Chad