I am rolling out Exchange 2007... we are currently using a POP3 server hosted by our ISP. My question is two parts: 1) When migrating users from the POP3 to Exchange, is it better to first create all the Exchange accounts in allof the Users'Outlook clients... and thenre-directall mail traffic to my Exchange servers IP?Oristhere some way to do a cutover from POP3 to Exchange incrementally? 2) I have configured myNetscreen VPN Client to access resources behind the firewall - I can ping everything when connected through the VPN - including my Exchange server.But I cannot "connect" to my Exchange server. Is there something in Exchange that has to be enable to accept these connections? Am I missing something? Anythoughts would be appreciated. Michael.