We currently hosts servers in-house.
One has Windows server 2003, and the other has Windows Server 2008 R2. Both are 32-bit.
Our company decided to move these servers into one server at a server hosting company (meaning the 2003 based applications will be upgraded to windows 2008).
Now a new request was added that in addition to the merge of the two servers, at the time of the merge we should upgrade the application on the server to the new application version - not yet in production or tested, and perform only one set of Tests on the new version in the new server.
I believe that it should be done in two phases, with two sets of testing, to have focus on the issues that will raise.
Can anyone raise the pros and cons of having it done in one or two phases?