Hopefully someone can help... I work for a hosting company. We host multiple domains under one exchange organizaiton. We are in the process of migrating to Exchange 2003. We currently have a lab environment setup for testing. Within the test enviroment I have two companies setup in 5.5 (CompA.com & CompB.com). When I installed and ran ADC the replication forced every user's smtp address back to my company's domain name. What causes ADC to change the primary smtp address? Thanks.