NOTE: This registration method uses Manual Upgrade and is not recommended for normal product registration on products that have internet access.
In a closed network, your NSv does not have internet access and cannot communicate directly with the SonicWall licensing server. To complete the registration process, you need to obtain information from MySonicWall and then log into SonicOS on your NSv and enter that information.

NOTE: Only an NSv which was registered online can be deregistered. If the NSv was registered using the offline method, deregistration is not supported.
TIP: For more information, please refer: SonicWall NSv Series Getting Started Guide