Hi - We are running GW2012sp2 - single server, primary domain and 5 post offices. We also have an external domain. (We are discontinuing use of eDir)

We will disconnect (LAN) the old server and apply its IP address to the new server after DBcopy domain and po's. Running the installer against the Domain, then the POs will upgrade the databases, and Distribution Lists become Groups, and GWIA and WebAccess look fairly straight forward (of course, we say that all the time and regret it later).
(1) can we upgrade directly to the latest GW14 release.
(2) how does the external domain/po get moved, or do we merely re-create it?
Note: Using Caledonia upgrade guide as our main resource.
(3) Integration to AD will be done later, depending upon everything else.