From Cloud Key Gen 1 to Cloud Key Gen 2.

• Check inform address on all “disconnected” devices.
• Check “unifi” dns entry on all DNS forwarding devices (DCs, firewalls).
• If controller name doesn't match everywhere (email alerts) rename the controller and then rename it back.
• If download of backup on old device isn't working, try rebooting, waiting a while (60 minutes?), then try download again.
• Cloud Key Gen 2 Plus didn't allow setting of static IP address.
• Users and admins granted access to old controller will be granted to new controller as part of restoring backup.
• The config.gateway.json file was included with the backup and restore.