I am in the midst of a project bringing up a new Exchange 2000 server fully patched on Windows 2000 server fully patched. Created 4 test users. 1 2 and 3 created on existing exchange (exchange.domainname.com) and 4 was created on exchange1 (exchange1.domainname.com) exchange and exchange1 are the actual server names, only the domain name changed. Tester1 moved to exchange1 Tester1 can communicate fine with Tester4. Tester2 can communicate fine with Tester3. Tester1 can not communicate with Tester 2 or 3. Tester4 can not communicate with Tester 2 or 3. In message tracking, on the messages that do not make it to the intended recipient, some show sent to the gateway server, others show sent to the categorizer and then that is it. There are 2 recipient policies in place besides default. The policies were to add an additional SMTP address for use with a gateway scanning server. One policy also added and additional SMTP address for one office where they want to have their full first and last name as part of the e-mail address. For now, I have deleted both of those policies leaving the default which has not been altered. I am seeing constant error messages in the log like below, which is why I deleted those two policies. I am continuing to work on this, but if any one has some advice please let me know. Event Type: Warning Event Source: MSExchangeMTA Event Category: Security Event ID: 9297 Date: 12/10/2004 Time: 9:55:56 PM User: N/A Computer: EXCHANGE Description: The user /o=clientdomain/ou=First Administrative Group/cn=Configuration/cn=Servers/cn=EXCHANGE1 has caused a security violation. Locality table (LTAB) index: 206. Windows 2000 error code: 0X80070005. [BASE IL MAIN BASE 1 237] (14) For more information, click http://www.microsoft.com/contentredirect.asp. John Tolmachoff Engineer/Consultant/Owner eServices For You