RPC over HTTP
 

We have several workstations that run XP Pro SP1, (Q331320 installed) with
Office 2003 with all updates from MS installed.
I am trying to configure RPC over HTTP to our Exchange2k3 server but on
these systems, in the mail connections tab of the mail applet there is no
option to set this up.
I know it can work on my network because I have 2 other remote users that we
purchased Outlook 2003 for (they were running Office 2000) and they are able
to configure it fine and it works wonderfully.
So, how do I get the options to show up on these other systems? I cannot
install SP2 for windows because it breaks many of the applications that we
are required to run.
Any thoughts?