I have two domain controllers and one exchange server in a physical server environment on site. I would like to set up some servers in the cloud to take over if one or all of the servers onsite fail. Can anyone recommend a set up for this? I need a procedure and a path for how to set up and implement this. My exchange server is exchange 2010 standard running on windows server 2008r2 standard. My domain controllers are on windows 2008 r2 enterprise.