Setup is as follows: Exchange 2007 SP3 on Windows 2008R2 VM1 = CAS + HTS Roles IP: a.a.a.a VM2 = CAS + HTS Roles IP: a.a.a.b VM1+VM2 = NLB (Load Balancing) IP: a.a.a.c Physical Server1 = Mail Server Role IP: a.a.a.d Physical Server2 = Mail Server Role IP: a.a.a.e Physical Server1 & 2 = Single Copy Cluster (Sharing SAN drive) Cluster Mail Server IP : a.a.a.f Question is: Which server/s should be in my MX Record? /thanks for your help guys.

Hi, MX record should point to HUB/EDGE public IP. So it should be a.a.a.c Regards,Laeeq Qazi|Team Lead(Exchange + Sharepoint + BES + DynamicsCRM) www.HostingController.com

Thanks for your quick reply Laeeq. That was my thought too. Will test soon...