Exchange 2010 Auto-Discover RPC over HTTP

Hello everyone,

We are moving to Exchange 2010 and RPC over HTTP is working fine but just have a few quick (hopefully) questions about it.

1. On Exchange 2003 when using RPC over HTTP we did not need to have "On fast networks, connect using HTTP first, then connect using TCP/IP" but now on the new 2010 exchange we do.
2. If number 1 is normal then how do I setup Auto-Discover or settings push to check off the "On fast networks, connect using HTTP first, then connect using TCP/IP" as when we set up a new outlook profile it does not automatically get checked off.

Any information at all would help.

Thanks,