Yes you can add the node back to the customer.
Refer below process:
- Delete the old entry of SZ from existing cluster node (leader node) from GUI and wait for 10-15 minutes.
- Factory reset the disconnected SZ node using FD button or using CLI (set-factory)
- Now setup the SZ over CLI setup or GUI wizard and choose Join cluster operation.
- Make sure you add correct cluster details when prompted by new SZ node setup.
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