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Check Autonomous Ransomware Protection licensing before reverting from ONTAP 9.11.1

Contributors netapp-forry netapp-aherbin netapp-ahibbard
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If you have configured Autonomous Ransomware Protection (ARP) and you revert from ONTAP 9.11.1 to ONTAP 9.10.1, you might experience warning messages and limited ARP functionality.

In ONTAP 9.11.1, the Anti-ransomware license replaced the Multi-Tenant Key Management (MTKM) license. If your system has the Anti_ransomware license but no MT_EK_MGMT license, you will see a warning during revert that ARP cannot be enabled on new volumes upon revert.

The volumes with existing protection will continue to work normally after revert, and ARP status can be displayed using the ONTAP CLI. System Manager cannot show ARP status without the MTKM license.

Therefore, if you want ARP to continue after reverting to ONTAP 9.10.1, be sure the MTKM license is installed before reverting. Learn about ARP licensing.