To perform an upgrade, you need to perform the following:
1. Upload the latest exchange plugin npk file to the Netvault server $NETVAULT_HOME\packages\standard
2. Identify these clients are being managed by which virtual client.
3. Check and note down the current virtual client name/IP and clients.
4. Delete this virtual client.
5. Add virtual client again with the same virtual name/IP and clients . Please choose the latest exchange plugin npk to be installed.
6. During the virtual client addition, all the clients plugin will be upgraded.
This will keep every previous backup setting configured as long as the name is the virtual client name and the same few clients are being added.