MIIS is a great tool for synch as are some other products such as LDSU from HP. There's another one that the name escapes me for at the moment. It was mentioned on this list a few times and had plenty of good endorsements. Check the archives for that. As for connectivity, you can use X.400 or SMTP connectors. I'd opt for a SMTP route myself. Al -----Original Message----- From: MartinMeigh [mailto:martin.meigh@xxxxxxxxxxxxxxxxxxxx] Sent: Wednesday, March 24, 2004 6:20 AM To: [ExchangeList] Subject: [exchangelist] Connectivity http://www.MSExchange.org/ I have two seperate exchange organisations on two serperate domains, one is a NT4.0 domain with exchange 5.5 using x400 connectors and the other is windows 2000 with exchange 2000 in native mode. How can i get messaging to route between both the domains as the nt domain has numerous address spaces so it will go direct to the servers and not out to the internet first, also i need to syn the global address lists any ideas how? cheers for any advice ------------------------------------------------------ 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 ------------------------------------------------------