We are using Exchange 2007 SP1.
We have several AD sites - SiteA, SiteB, SiteC etc. Exchange servers are in SiteA and there are different Exchange servers per role.
I'm trying to figure out a question about how the Mailbox role connects with the Hub Transport. From what I understand, the Mailbox server has a list of Hub Transports in its local AD site.
Question1: How does it get this list? DSAccess process?
Question2: Let's say that I build a Hub Transport in SiteB. Currently, all other Exchange 2007 servers are in SiteA. If I was to lose my Hub Transport in SiteA, would the Mailbox server in SiteB be able to route mail via the Hub Transport in SiteB? Or does the Hub HAVE to be in the same AD site as the Mailbox server?
Question3: Assuming that the Hub HAS to be in the same site as the Mailbox server, is there a way to hardcode a secondary Hub, in a different AD site, for the Mailbox server to use?