My organization is going to embark on and upgrade from ES2.5 to ES4. The upgrade we are going to perform is the ES4 upgrade that comes with a maintenance agreement.
We are going to add new servers and basically start over.
I have been searching for documentation on how to do this upgrade. I need verification of the process. What I am seeing is that we need to load ES2.5 on the new servers and then apply the ES4 upgrade to ES2.5. Is this correct?