About the SAN Client license key
On the NetBackup master server, enter the license that activates the SAN Client feature.
If the license expires or is unavailable (such as in a disaster recovery situation), backups and restores occur over the LAN.
Ransomware attackers specifically target and attempt to destroy backup systems to increase the probability of payment. Hardening your system is critical. Please ensure you have reviewed your platform security using the Security Hardening Checklist