I have an Outlook 2003 client that is connecting to exchange server via RPC
over HTTP. Whenever Oultook is launched or an active sync is attempted with
the client, the user is prompted to enter a username and password. Is there
a way to turn this authentication off? Other systems on the network
configured for RPC over HTTP access are not prompting for authentication.
I'm puzzled by what is causing this.

Thanks,
Mike