Hi Debbie, I haven't personally seen this before, but a quick check on eventid.net lists some Q articles to check. Try: http://www.eventid.net/display.asp?eventid=9322&source= Jamie. -----Original Message----- From: Debbie Rice [mailto:drice@xxxxxxxxxx] Sent: Wednesday, 30 April 2003 2:27 AM To: [ExchangeList] Subject: [exchangelist] MSExchangeMTA http://www.MSExchange.org/ Sorry about that. The problem I'm getting is an Event ID: 9322 with error 1722. An interface error has occurred. I have seven site connectors and two of them cannot send to two others but can to the other three. I've updated the Host file on all of the exchange servers. I'm running Exchange Server 5.5 w/sp 3 on all NT 4.0 Servers. I have a service user that is the same in all of the domains and sites. The domains are untrusted, but they all are and some do work. If you have any suggestions, it would be greatly appreciated.