To replace an HA Primary unit
Check Enable High Availability.
The old Secondary unit now becomes the Primary unit. Its serial number is automatically displayed in the Primary SonicWall Serial Number field.
Contact SonicWall Technical Support to transfer the security services licenses from the former HA Pair to the new HA Pair.
This step is required when the HA Primary unit has failed because the licenses are linked to the Primary unit in an HA Pair.