After you have the new server set up, make sure that everything is working by doing a couple of simple actions:

Navigate the web interface and check if everything is working as expected. Check if your settings are there and haven't been modified.
Upload a file through the web interface to the Sync and Share section and do the same for any Network nodes you have set up (if any).
Connect to the new server with a desktop client and a mobile client applications.
Upload and download some files through the desktop and/or mobile clients.