Our company together with AMS is planning to upgrade our AEM version from 6.1 to 6.3, do you have any checklist/steps on how we do the migration of our sites from 6.1 to 6.3 like what needs to be test. I have these in mind though, connectivity testing (for the new instances), functionality testing of the applications (more of regression), aside from these, what other things that we need to look at?Thanks for all your help.