I have ISA 2004 Server setup to allow OL2k3 users to access their emails by RPC over HTTP when they are away from the office with their notebooks. I am wondering if there is anyway to force OL2k3 to use their users local credentials to login via RPC over HTTP on the local LAN instead of prompting them for a username and password each time. It's already driving the employees mad; we had to call the men in white coats to take them away.. ;) Thanks Andrew