To be able to connect to a Microsoft Exchange Server in that way, the firewall has to have a number of ports open. However, the absolute best way is to use ISA server as the firewall, as that is application aware and allows to easily "publish" Exchange securely, as opposed to just opening ports. John Tolmachoff Engineer/Consultant/Owner eServices For You > -----Original Message----- > From: A. Michael Salim [mailto:msalim@xxxxxxxxxxxx] > Sent: Friday, October 31, 2003 6:48 AM > To: [ExchangeList] > Subject: [exchangelist] Setting up a "MS Exchange Server" account across > Internet for Outlook > > http://www.MSExchange.org/ > > Hi all, > > I have a MS Exchange 2003 server installed on the internet (as an "ASP" > installation). All clients are connected over the Internet, i.e. no local > LAN connections, no netbios traffic. > > As a user, I am able to create and successfully use a POP3 or an IMAP > account on the server, but I am unable to create a "Microsoft Exchange > Server" account (e.g. via the "Mail" icon in the control panel). > > Are "Microsoft Exchange Server" accounts only available to Outlook via a > local LAN connection, or is there a way to establish these accounts over > the Internet, and if so, what might I be missing or need to check? I have > tried Outlook 2000, XP and 2003, same deal - unable to create "Microsoft > Exchange Server" accounts. > > TIA! > > Mike. > > > ------------------------------------------------------ > List Archives: http://www.webelists.com/cgi/lyris.pl?enter=exchangelist > Exchange Newsletters: http://www.msexchange.org/pages/newsletter.asp > Exchange FAQ: http://www.msexchange.org/pages/larticle.asp?type=FAQ > ------------------------------------------------------ > Other Internet Software Marketing Sites: > Leading Network Software Directory: http://www.serverfiles.com > No.1 ISA Server Resource Site: http://www.isaserver.org > Windows Security Resource Site: http://www.windowsecurity.com/ > Network Security Library: http://www.secinf.net/ > Windows 2000/NT Fax Solutions: http://www.ntfaxfaq.com > ------------------------------------------------------