I am looking to install a secondary/Temp Exchange 2010 server into a single Exchange server environment. The reason behind this is so i can rebuild the original server due to hardware issues. Yes this is the only option other than blowing away the original server and restoring it after an OS rebuild. I was going to build it and bring it into the environment, migrate the data across rebuild the original server and re migrate everything back. Has anyone attempted this? If so can you let me know if you ran into any problems or have any recommendations? Do i just install Exchange with all the same options as the original. then do the same later on the original server? Any help/suggestions/process documents would be very helpful

Hi If you install all roles on one server, you can install other server in the same domain and move mailbox to it. Terence Yu TechNet Community Support