I have a problem here....Part of our company was purchased and is undergoing a "transition" for a few months. These 20 users all run Outlook 2007, are sitting on my LAN and use my Exchange server. The company that purchased this part of our business already has set up email accounts on their Exchange server and have told the users they can use OWA to access it, but the users are not happy about this. Is it possible to still sit behind our firewall, be on our domain BUT connect Outlook to this other companies Exchange server and be able to send and receive email from their new accounts? I'm thinking there wouldn't be a problem connecting and receiving email, but there would most likely be an issue when trying to SEND email from behind our firewall......I don't want to open up relaying on my Exchange server....Thoughts? Advice? Thanks.