I'm planning to do an upgrade for my company to exchange 2010 early next year. I'd like to set something up that will make exchange highly available to our users even if our primary site fails. The primary site is where our main computer room is located and where I'm planning to do the upgrade. It will all be done virtually in VMWare. I also have rack space rented at an off-site facility with a fast internet connection and VPN back to the main office. How can I use these resources to setup exchange 2010 so that even if one of the two sites go down email is still accessable? I've been reading up on all of the new features and I have a decent understanding of a basic setup but I'm not sure how to go about making this all work across two sites. Any input would be greatly appreciated, thanks!