We are going to be upgrading to exchange 2010 and I am curious. If we are going to have 2 exchange 2010 servers A and B each holding the HUB/CAS and MB server roles . From what I know all mail goes through the HT server even internal mail but I believe I heard that.. lets say my MB is on server A which also holds the HB server role and I am sending an email to Joe Shmoe who is on the same mail server ..because there are 2 HB servers in my domain my email to Joe would be routed to the HB server B and then back to server A to Joe. Is this correct? If so is there a way to force all local mail to go through a certain hub? I hope I explained this okay. The reason I ask this question is that I am concerned if this is indeed true that if I place server A in my production domain and I put Server B in my DR location which is offsite there will be a delay. Thank you in advance for your help.