High Availability server instances
The licensing of CPU VPs is also applicable to secondary servers in an HA configuration. The number of HA licenses available from the license server will be the same as the regular CPU entitlement. If the secondary instance is read only and has only 2 concurrent sessions connected, then HA specific, HID_CPU_HA licenses will be requested from the license server. If the secondary server is configured as updatable, or has more than 2 concurrent sessions connected, then regular HID_CPU licenses will be required to run that instance.
If a read only Secondary has to switch to primary mode, then it will return the HA licenses and acquire regular CPU licenses. This should be available as the primary is no longer online and should return its entitlement.